diff --git a/build/make.linux64.test.py b/build/make.linux64.test.py
index 1ac9d00..3f5a686 100644
--- a/build/make.linux64.test.py
+++ b/build/make.linux64.test.py
@@ -17,7 +17,7 @@ builddir = "./build_linux64"
 doinstall = True   #copies the build_output to the install dir when finished
 cc = "nvcc" #compiler
 cflags = "-dc --compiler-options '-fPIC -O3'"
-libraries = "-l{}".format(libname)
+libraries = "-l{} -lpthread".format(libname)
 libdirs = "-L{} -L{}/lib -L{}/lib".format(builddir,commondir,depdir)
 linkerflags = " -Xlinker=-rpath,."
 srcexts = [".c",".cpp",".cu"]
diff --git a/build_linux64/libamsculib3.linux64.a b/build_linux64/libamsculib3.linux64.a
index 198af3b..85fcdfa 100644
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diff --git a/build_linux64/objstore/amscu_comp128.o b/build_linux64/objstore/amscu_comp128.o
index d7d4407..ce93238 100644
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diff --git a/build_linux64/objstore/amscu_comp64.o b/build_linux64/objstore/amscu_comp64.o
index 4e0ef13..857defc 100644
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diff --git a/build_linux64/objstore/amscu_cputhreading.o b/build_linux64/objstore/amscu_cputhreading.o
new file mode 100644
index 0000000..1127744
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diff --git a/build_linux64/objstore/amscu_cudafunctions.o b/build_linux64/objstore/amscu_cudafunctions.o
index f996fbb..88ba106 100644
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diff --git a/build_linux64/objstore/amscuarray.o b/build_linux64/objstore/amscuarray.o
index c0177d3..f850628 100644
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diff --git a/build_linux64/objstore/amscuarray_dops.o b/build_linux64/objstore/amscuarray_dops.o
index 55fc2b2..91cc157 100644
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diff --git a/build_linux64/objstore/amscufhash.o b/build_linux64/objstore/amscufhash.o
index 1d4827a..ffec4eb 100644
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diff --git a/build_linux64/objstore/amscugeom.o b/build_linux64/objstore/amscugeom.o
index 69e1bc2..dfd6eb2 100644
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diff --git a/build_linux64/objstore/amsculib3.o b/build_linux64/objstore/amsculib3.o
index adc331e..858a295 100644
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diff --git a/build_linux64/objstore/amscumath.o b/build_linux64/objstore/amscumath.o
index 96cb9dd..0c17960 100644
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diff --git a/build_linux64/objstore/amscupcg.o b/build_linux64/objstore/amscupcg.o
index 1bfa65a..fe2f4e4 100644
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diff --git a/build_linux64/objstore/amscurandlcg.o b/build_linux64/objstore/amscurandlcg.o
index db1dbaf..9f889e9 100644
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diff --git a/build_linux64/objstore/amscurandom1.o b/build_linux64/objstore/amscurandom1.o
index ae4665f..0af19a2 100644
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diff --git a/build_linux64/objstore/amscurandom1_dbuff.o b/build_linux64/objstore/amscurandom1_dbuff.o
index 5291cba..1816f0f 100644
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diff --git a/build_linux64/objstore/amscurandom1_hbuff.o b/build_linux64/objstore/amscurandom1_hbuff.o
index 4f03534..cc2edf1 100644
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diff --git a/build_linux64/objstore/amscurandom_tests1.o b/build_linux64/objstore/amscurandom_tests1.o
index ebb723a..c099166 100644
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diff --git a/build_linux64/objstore/amscurarray.o b/build_linux64/objstore/amscurarray.o
index 6df5b4d..ca3dcab 100644
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diff --git a/build_linux64/objstore/amscusplitmix.o b/build_linux64/objstore/amscusplitmix.o
index 9df9f59..4704f70 100644
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diff --git a/build_linux64/objstore/amsxoroshiro.o b/build_linux64/objstore/amsxoroshiro.o
index 2c7743c..e4ce3ef 100644
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diff --git a/build_linux64/objstore/cuvec2.o b/build_linux64/objstore/cuvec2.o
index ed52394..c09c35d 100644
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diff --git a/build_linux64/objstore/cuvec2f.o b/build_linux64/objstore/cuvec2f.o
index 22ae19e..3075409 100644
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diff --git a/build_linux64/objstore/cuvec2i.o b/build_linux64/objstore/cuvec2i.o
index 59929a8..6c4f47b 100644
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diff --git a/build_linux64/objstore/cuvec3.o b/build_linux64/objstore/cuvec3.o
index d323ec4..06b05b2 100644
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diff --git a/build_linux64/objstore/cuvec3f.o b/build_linux64/objstore/cuvec3f.o
index cd4bef3..a41e614 100644
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diff --git a/build_linux64/objstore/cuvec3i.o b/build_linux64/objstore/cuvec3i.o
index d337f37..bfdf711 100644
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diff --git a/build_linux64/objstore/cuvec4.o b/build_linux64/objstore/cuvec4.o
index 16abc9b..fdcedbe 100644
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diff --git a/build_linux64/objstore/cuvec4f.o b/build_linux64/objstore/cuvec4f.o
index b810182..8dd5c75 100644
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diff --git a/build_linux64/objstore/cuvec4i.o b/build_linux64/objstore/cuvec4i.o
index d78340a..366b5d0 100644
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diff --git a/build_linux64/test b/build_linux64/test
index 5ecad41..1569edf 100644
Binary files a/build_linux64/test and b/build_linux64/test differ
diff --git a/include/amsculib3/amsculib3.hpp b/include/amsculib3/amsculib3.hpp
index 3d4d8c3..6231635 100644
--- a/include/amsculib3/amsculib3.hpp
+++ b/include/amsculib3/amsculib3.hpp
@@ -7,7 +7,12 @@
 #include <math.h>
 #include <stdint.h>
 #include <time.h>
+
+//C++ standard library headers
 #include <new>
+#include <thread>
+#include <functional>
+#include <mutex>
 
 #include <cuda_runtime_api.h> //where all the cuda functions live
 #include <cuda_runtime.h>
@@ -41,12 +46,18 @@ namespace amscuda
     //default numthreads to execute on cpu
     AMSCU_CONST static const int amscu_defcputhreads = 8;
 
+    AMSCU_CONST static const int amscu_success = 1;
+    AMSCU_CONST static const int amscu_meh = 0;
+    AMSCU_CONST static const int amscu_failure = -1;
+    
+
 }; //end namespace amscuda
 
 //Components
 #include <amsculib3/amscu_cudafunctions.hpp>
 #include <amsculib3/math/amscumath.hpp>
 #include <amsculib3/geom/amscugeom.hpp>
+#include <amsculib3/util/amscu_util.hpp>
 
 #include <amsculib3/amscuarray.hpp>
 #include <amsculib3/amscuda_binarrrw.hpp>
diff --git a/include/amsculib3/random/amscurandom.cuh b/include/amsculib3/random/amscurandom.cuh
index 68f52af..3365a39 100644
--- a/include/amsculib3/random/amscurandom.cuh
+++ b/include/amsculib3/random/amscurandom.cuh
@@ -34,18 +34,18 @@ __host__ __device__ float randnf(randstate_t *state = NULL);
 __host__ __device__ double randn(randstate_t *state = NULL);
 
 //Operations to fill a host buffer with random values
-__host__ int hbuff_randf(float *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int hbuff_rand(double *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int hbuff_randnf(float *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int hbuff_randn(double *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int hbuff_randint(int *hbuffer, int64_t size, int low, int high, randstate_t *state = NULL);
+__host__ int hbuff_randf(float *hbuffer, int size, randstate_t *state = NULL);
+__host__ int hbuff_rand(double *hbuffer, int size, randstate_t *state = NULL);
+__host__ int hbuff_randnf(float *hbuffer, int size, randstate_t *state = NULL);
+__host__ int hbuff_randn(double *hbuffer, int size, randstate_t *state = NULL);
+__host__ int hbuff_randint(int *hbuffer, int size, int low, int high, randstate_t *state = NULL);
 
 //Operations to fill a device buffer with random values
-__host__ int dbuff_randf(float *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int dbuff_rand(double *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int dbuff_randnf(float *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int dbuff_randn(double *hbuffer, int64_t size, randstate_t *state = NULL);
-__host__ int dbuff_randint(int *hbuffer, int64_t size, int low, int high, randstate_t *state = NULL);
+__host__ int dbuff_randf(float *dbuffer, int size, randstate_t *state = NULL);
+__host__ int dbuff_rand(double *dbuffer, int size, randstate_t *state = NULL);
+__host__ int dbuff_randnf(float *dbuffer, int size, randstate_t *state = NULL);
+__host__ int dbuff_randn(double *dbuffer, int size, randstate_t *state = NULL);
+__host__ int dbuff_randint(int *dbuffer, int size, int low, int high, randstate_t *state = NULL);
 
 
 //Tests
diff --git a/include/amsculib3/util/amscu_cputhreading.hpp b/include/amsculib3/util/amscu_cputhreading.hpp
new file mode 100644
index 0000000..0b6e4ef
--- /dev/null
+++ b/include/amsculib3/util/amscu_cputhreading.hpp
@@ -0,0 +1,22 @@
+#ifndef __AMSCU_CPUTHREADING_HPP__
+#define __AMSCU_CPUTHREADING_HPP__
+
+namespace amscuda
+{
+namespace util
+{
+
+int amscpu_cputhreading_threadplan(int probsize);
+
+//A template function that takes as input a function pointer and a series of arguments
+//The function is executed with fptr(threadnum, nthreads, otherargs...) with a dynamic number of threads
+//psize must be supplied, which will call amscpu_cputhreading_threadplan to determine number of threads to use for execution
+template<typename callable, typename ... argst> int threaded_execute(callable &&fptr, int64_t psize, argst&&... args);
+
+
+};
+};
+
+#include <amsculib3/util/amscu_cputhreading_impl.hpp>
+
+#endif 
\ No newline at end of file
diff --git a/include/amsculib3/util/amscu_cputhreading_impl.hpp b/include/amsculib3/util/amscu_cputhreading_impl.hpp
new file mode 100644
index 0000000..72273bb
--- /dev/null
+++ b/include/amsculib3/util/amscu_cputhreading_impl.hpp
@@ -0,0 +1,73 @@
+#ifndef __AMSCU_CPUTHREADING_IMPL_HPP__
+#define __AMSCU_CPUTHREADING_IMPL_HPP__
+
+namespace amscuda
+{
+namespace util
+{
+    
+template<typename callable, typename ... argst> int threaded_execute(callable &&fptr, int64_t psize, argst&&... args)
+{
+    int ret = amscu_success;
+
+    int I;
+    std::vector<std::thread*> threads;
+    int nthreads = amscpu_cputhreading_threadplan(psize);
+
+    if(nthreads<=1)
+    {
+        nthreads = 1;
+        I = 0;
+        // std::invoke(
+        //     std::forward<callable>(fptr),
+        //     I,
+        //     nthreads,
+        //     std::forward<argst>(args)...
+        // );
+
+        //std::invoke is a C++17 feature, and mingw8 complains even so.
+        // Can I get away with just calling the functions?
+        fptr(I,nthreads,std::forward<argst>(args)...);
+    }
+    else
+    {
+        threads.resize(nthreads);
+        for(I=0;I<nthreads;I++) threads[I] = NULL;
+        for(I=0;I<nthreads;I++)
+        {
+            threads[I] = new(std::nothrow) std::thread
+            (
+                std::forward<callable>(fptr),
+                I,
+                nthreads,
+                std::forward<argst>(args)...
+            );
+        }
+        for(I=0;I<nthreads;I++)
+        {
+            if(threads[I]==NULL)
+            { //null thread creation failure check
+                //printf("debug check!\n");
+                ret = amscu_failure;
+            }
+        }
+        for(I=0;I<nthreads;I++)
+        {
+            if(threads[I]!=NULL)
+            {
+                threads[I]->join();
+                delete threads[I];
+                threads[I] = NULL;
+            }
+        }
+    }
+
+    return ret;
+}
+
+
+
+};
+};
+
+#endif 
\ No newline at end of file
diff --git a/include/amsculib3/util/amscu_util.hpp b/include/amsculib3/util/amscu_util.hpp
new file mode 100644
index 0000000..7fde3da
--- /dev/null
+++ b/include/amsculib3/util/amscu_util.hpp
@@ -0,0 +1,15 @@
+#ifndef __AMSCU_UTIL_CUH__
+#define __AMSCU_UTIL_CUH__
+
+namespace amscuda
+{
+namespace util
+{
+
+
+};
+};
+
+#include <amsculib3/util/amscu_cputhreading.hpp>
+
+#endif 
\ No newline at end of file
diff --git a/src/amsculib3/random/amscurandom1.cu b/src/amsculib3/random/amscurandom1.cu
index 27c6fbc..7a972e0 100644
--- a/src/amsculib3/random/amscurandom1.cu
+++ b/src/amsculib3/random/amscurandom1.cu
@@ -8,12 +8,12 @@ namespace random
 {
 
     //Choosing xoroshiro64** as my default RNG due to 32 bit only operations 
-    randstate_t global_rand_cpustate = xs64ss_state();
+    randstate_t global_randstate = xs64ss_state();
 
 
     __host__ void rand_seed(const uint32_t seed)
     {
-        global_rand_cpustate = xs64ss_state(seed);
+        global_randstate = xs64ss_state(seed);
     }
 
     __host__ __device__ void rand_state_increment(const int32_t inc, randstate_t *state)
@@ -22,7 +22,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
         xoroshiro::xs64ss_state* s2 = (xoroshiro::xs64ss_state*)state;
         s2->low += inc;
@@ -36,7 +36,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
         xs64ss_next((xoroshiro::xs64ss_state*)state);
         return;
@@ -49,7 +49,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
 
         ret = xoroshiro::xs64ss_next((xoroshiro::xs64ss_state*)state);
@@ -63,7 +63,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
         int32_t q = (int)((randui32(state)>>1U)%(1U<<16U));
         ret = (q%(high-low))+low;
@@ -77,7 +77,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
         ret= ((float)randui32(state))/(4294967296.0f);
         return ret;
@@ -90,7 +90,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
         ret= ((double)randui32(state))/(4294967296.0f);
         return ret;
@@ -103,7 +103,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
 
         q1 = randf(state);
@@ -118,7 +118,7 @@ namespace random
             // GPU-specific code (device path)
         #else
             // CPU-specific code (host path)
-            if(state==NULL) state = &global_rand_cpustate;
+            if(state==NULL) state = &global_randstate;
         #endif
 
         q1 = rand(state);
diff --git a/src/amsculib3/random/amscurandom1_hbuff.cu b/src/amsculib3/random/amscurandom1_hbuff.cu
index 51eae29..c4a710e 100644
--- a/src/amsculib3/random/amscurandom1_hbuff.cu
+++ b/src/amsculib3/random/amscurandom1_hbuff.cu
@@ -4,6 +4,290 @@ namespace amscuda
 {
 namespace random
 {
+    template<typename dtype, typename randfunc> void rand_threadfunc1(
+        int threadnum,
+        int nthreads,
+        randfunc &&rf,
+        dtype *buffer,
+        int64_t N,
+        randstate_t *seed
+    )
+    {
+        int64_t I,Is,I0,I1;
 
+        Is = N/nthreads;
+        if(Is<1) Is = 1;
+        I0 = Is*(threadnum);
+        I1 = Is*(threadnum+1);
+        if(I1>N) I1 = N;
+
+        for(I=I0;I<I1;I++)
+        {
+            buffer[I] = rf(seed);
+        }
+        return;
+    }
+
+    template<typename callable, typename randfunc, typename dtype> 
+    int hbuff_rand_threadedexec(
+        callable &&fptr, 
+        randfunc &&rf,
+        dtype *buffer, 
+        int64_t N, 
+        randstate_t *mainseed
+    )
+    {
+        int ret = amscu_success;
+
+        int I;
+        std::vector<std::thread*> threads;
+        std::vector<randstate_t> seeds;
+        int nthreads = amscuda::util::amscpu_cputhreading_threadplan(N);
+
+        if(nthreads<=1)
+        {
+            nthreads = 1;
+            I = 0;
+            fptr(I,nthreads,rf,buffer,N,mainseed);
+        }
+        else
+        {
+            threads.resize(nthreads);
+            seeds.resize(nthreads);
+            for(I=0;I<nthreads;I++)
+            {
+                seeds[I] = *mainseed;
+                rand_state_increment(I,&seeds[I]);
+            }
+            rand_state_increment(I,mainseed);
+
+            for(I=0;I<nthreads;I++) threads[I] = NULL;
+            for(I=0;I<nthreads;I++)
+            {
+                threads[I] = new(std::nothrow) std::thread
+                (
+                    std::forward<callable>(fptr),
+                    I,
+                    nthreads,
+                    rf,
+                    buffer,
+                    N,
+                    &seeds[I]
+                );
+            }
+            for(I=0;I<nthreads;I++)
+            {
+                if(threads[I]==NULL)
+                { //null thread creation failure check
+                    ret = amscu_failure;
+                }
+            }
+            for(I=0;I<nthreads;I++)
+            {
+                if(threads[I]!=NULL)
+                {
+                    threads[I]->join();
+                    delete threads[I];
+                    threads[I] = NULL;
+                }
+            }
+        }
+
+        return ret;
+    }
+
+    template<typename dtype, typename rngbnd, typename randfunc> void rand_threadfunc2(
+        int threadnum,
+        int nthreads,
+        randfunc &&rf,
+        dtype *buffer,
+        int64_t N,
+        rngbnd min,
+        rngbnd max,
+        randstate_t *seed
+    )
+    {
+        int64_t I,Is,I0,I1;
+
+        Is = N/nthreads;
+        if(Is<1) Is = 1;
+        I0 = Is*(threadnum);
+        I1 = Is*(threadnum+1);
+        if(I1>N) I1 = N;
+
+        for(I=I0;I<I1;I++)
+        {
+            buffer[I] = rf(min,max,seed);
+        }
+        return;
+    }
+
+    template<typename callable, typename randfunc, typename rngbnd, typename dtype> 
+    int hbuff_rand_threadedexec2(
+        callable &&fptr, 
+        randfunc &&rf,
+        dtype *buffer, 
+        int64_t N, 
+        rngbnd min,
+        rngbnd max,
+        randstate_t *mainseed
+    )
+    {
+        int ret = amscu_success;
+
+        int I;
+        std::vector<std::thread*> threads;
+        std::vector<randstate_t> seeds;
+        int nthreads = amscuda::util::amscpu_cputhreading_threadplan(N);
+
+        if(nthreads<=1)
+        {
+            nthreads = 1;
+            I = 0;
+            fptr(I,nthreads,rf,buffer,N,min,max,mainseed);
+        }
+        else
+        {
+            threads.resize(nthreads);
+            seeds.resize(nthreads);
+            for(I=0;I<nthreads;I++)
+            {
+                seeds[I] = *mainseed;
+                rand_state_increment(I,&seeds[I]);
+            }
+            rand_state_increment(I,mainseed);
+
+            for(I=0;I<nthreads;I++) threads[I] = NULL;
+            for(I=0;I<nthreads;I++)
+            {
+                threads[I] = new(std::nothrow) std::thread
+                (
+                    std::forward<callable>(fptr),
+                    I,
+                    nthreads,
+                    rf,
+                    buffer,
+                    N,
+                    min,max,
+                    &seeds[I]
+                );
+            }
+            for(I=0;I<nthreads;I++)
+            {
+                if(threads[I]==NULL)
+                { //null thread creation failure check
+                    ret = amscu_failure;
+                }
+            }
+            for(I=0;I<nthreads;I++)
+            {
+                if(threads[I]!=NULL)
+                {
+                    threads[I]->join();
+                    delete threads[I];
+                    threads[I] = NULL;
+                }
+            }
+        }
+
+        return ret;
+    }
+
+    __host__ int hbuff_randf(float *hbuffer, int size, randstate_t *state)
+    {
+        int ret = amscu_success;
+        int res;
+        if(state==NULL) state = &global_randstate;
+
+        res = hbuff_rand_threadedexec(
+            rand_threadfunc1<float, float (*)(amscuda::random::randstate_t*)>,
+            randf,
+            hbuffer,
+            (int64_t) size,
+            state
+        );
+
+        if(res!=amscu_success) ret = amscu_failure;
+
+        return ret;
+    }
+
+    __host__ int hbuff_rand(double *hbuffer, int size, randstate_t *state)
+    {
+        int ret = amscu_success;
+        int res;
+        if(state==NULL) state = &global_randstate;
+
+        res = hbuff_rand_threadedexec(
+            rand_threadfunc1<double, double (*)(amscuda::random::randstate_t*)>,
+            rand,
+            hbuffer,
+            (int64_t) size,
+            state
+        );
+
+        if(res!=amscu_success) ret = amscu_failure;
+
+        return ret;
+    }
+
+    __host__ int hbuff_randnf(float *hbuffer, int size, randstate_t *state)
+    {
+        int ret = amscu_success;
+        int res;
+        if(state==NULL) state = &global_randstate;
+
+        res = hbuff_rand_threadedexec(
+            rand_threadfunc1<float, float (*)(amscuda::random::randstate_t*)>,
+            randnf,
+            hbuffer,
+            (int64_t) size,
+            state
+        );
+
+        if(res!=amscu_success) ret = amscu_failure;
+
+        return ret;
+    }
+
+    __host__ int hbuff_randn(double *hbuffer, int size, randstate_t *state)
+    {
+        int ret = amscu_success;
+        int res;
+        if(state==NULL) state = &global_randstate;
+
+        res = hbuff_rand_threadedexec(
+            rand_threadfunc1<double, double (*)(amscuda::random::randstate_t*)>,
+            randn,
+            hbuffer,
+            (int64_t) size,
+            state
+        );
+
+        if(res!=amscu_success) ret = amscu_failure;
+
+        return ret;
+    }
+
+    __host__ int hbuff_randint(int *hbuffer, int size, int low, int high, randstate_t *state)
+    {
+        int ret = amscu_success;
+        int res;
+        if(state==NULL) state = &global_randstate;
+
+        res = hbuff_rand_threadedexec2(
+            rand_threadfunc2<int, int, int (*)(int, int, amscuda::random::randstate_t*)>,
+            randint,
+            hbuffer,
+            (int64_t) size,
+            low,high,
+            state
+        );
+
+        if(res!=amscu_success) ret = amscu_failure;
+
+        return ret;
+    }
+    
 }; //end namespaces
 };
\ No newline at end of file
diff --git a/src/amsculib3/random/amscurandom_tests1.cu b/src/amsculib3/random/amscurandom_tests1.cu
index b663b4c..1659be0 100644
--- a/src/amsculib3/random/amscurandom_tests1.cu
+++ b/src/amsculib3/random/amscurandom_tests1.cu
@@ -5,55 +5,27 @@ namespace amscuda
 namespace random
 {
 
-    __host__ void amscurand_tests1()
+    __host__ void amscurand_tests1_randstat1()
     {
-        using namespace random;
-        printf("Random number generator basic function test:\n");
         int I;
-        // uint32_t q1;
-        // float q2;
-        // double q3;
-        // int q4;
-        
-        rand_seed(0);
-        printf("from seed 0...\n");
-        for(I=0;I<10;I++)
-        {
-            printf("randui32[%d] = %u\n",I,randui32());
-        }
-
-        rand_seed(0);
-        printf("from seed 0...\n");
-        for(I=0;I<10;I++)
-        {
-            printf("randf[%d] = %1.3f\n",I,randf());
-        }
-
-        rand_seed(0);
-        printf("from seed 0...\n");
-        for(I=0;I<10;I++)
-        {
-            printf("randf[%d] = %1.3f\n",I,rand());
-        }
-
         float q0,qlast,qmindelta,qmaxdelta,qmx,qmn,qmean,qstd,qsum,qsumsq;
         int N = 100000;
-        uint32_t seed= 34533623;
+        uint32_t seed= 2;
         rand_seed(seed);
         printf("from seed %u...\n",seed);
-        q0 = randf();
+        q0 = randnf();
         qmx = q0;
         qmn = q0;
         qsum = 0.0f;
         qsumsq = 0.0f;
         qlast = q0;
-        q0 = randf();
+        q0 = randnf();
         qmindelta = ::fabsf(q0-qlast);
         qmaxdelta = ::fabsf(q0-qlast);
         for(I=0;I<N;I++)
         {
             qlast = q0;
-            q0 = randf();
+            q0 = randnf();
 
             qsum += q0;
             qsumsq += q0*q0;
@@ -66,13 +38,93 @@ namespace random
         qmean = qsum/((float)N);
         qstd = ::sqrtf((qsumsq-qsum*qsum/((float)N))/((float)N));
 
-        printf("Statistics for randf() N=%d\n",N);
+        printf("Statistics for randnf() N=%d\n",N);
         printf("\tmin: %1.3g\n",qmn);
         printf("\tmax: %1.3g\n",qmx);
         printf("\tmean: %1.3g\n",qmean);
         printf("\tstdev: %1.3g\n",qstd);
         printf("\tmindelta: %1.3g\n",qmindelta);
         printf("\tmaxdelta: %1.3g\n",qmaxdelta);
+    }
+
+    __host__ void amscurand_tests1_randstat2()
+    {
+        int I;
+        double q0,qlast,qmindelta,qmaxdelta,qmx,qmn,qmean,qstd,qsum,qsumsq;
+        int N = 100000;
+        uint32_t seed= 2;
+        rand_seed(seed);
+        printf("from seed %u...\n",seed);
+        q0 = randn();
+        qmx = q0;
+        qmn = q0;
+        qsum = 0.0f;
+        qsumsq = 0.0f;
+        qlast = q0;
+        q0 = randn();
+        qmindelta = ::fabs(q0-qlast);
+        qmaxdelta = ::fabs(q0-qlast);
+        for(I=0;I<N;I++)
+        {
+            qlast = q0;
+            q0 = randn();
+
+            qsum += q0;
+            qsumsq += q0*q0;
+            if(q0>qmx) qmx = q0;
+            if(q0<qmn) qmn = q0;
+            if(::fabs(q0-qlast)<qmindelta) qmindelta = ::fabs(q0-qlast);
+            if(::fabs(q0-qlast)>qmaxdelta) qmaxdelta = ::fabs(q0-qlast);
+        }
+
+        qmean = qsum/((double)N);
+        qstd = ::sqrt((qsumsq-qsum*qsum/((double)N))/((double)N));
+
+        printf("Statistics for randn() N=%d\n",N);
+        printf("\tmin: %1.6g\n",qmn);
+        printf("\tmax: %1.6g\n",qmx);
+        printf("\tmean: %1.6g\n",qmean);
+        printf("\tstdev: %1.6g\n",qstd);
+        printf("\tmindelta: %1.6g\n",qmindelta);
+        printf("\tmaxdelta: %1.6g\n",qmaxdelta);
+    }
+
+
+    __host__ void amscurand_tests1()
+    {
+        printf("Random number generator basic function test:\n");
+        int I;
+        // uint32_t q1;
+        // float q2;
+        // double q3;
+        // int q4;
+        
+        rand_seed(1);
+        printf("from seed 1...\n");
+        for(I=0;I<10;I++)
+        {
+            printf("randui32[%d] = %u\n",I,randui32());
+        }
+
+        rand_seed(1);
+        printf("from seed 1...\n");
+        for(I=0;I<10;I++)
+        {
+            printf("randf[%d] = %1.3f\n",I,randf());
+        }
+
+        rand_seed(0);
+        printf("from seed 0...\n");
+        for(I=0;I<10;I++)
+        {
+            printf("randf[%d] = %1.3f\n",I,rand());
+        }
+
+
+        amscurand_tests1_randstat1();
+        amscurand_tests1_randstat2();
+        
+
 
 
         return;
diff --git a/src/amsculib3/random/amsxoroshiro.cu b/src/amsculib3/random/amsxoroshiro.cu
index fbfaf13..42f7339 100644
--- a/src/amsculib3/random/amsxoroshiro.cu
+++ b/src/amsculib3/random/amsxoroshiro.cu
@@ -100,7 +100,7 @@ namespace xoroshiro
 
     __host__ __device__  void xs128pp_jump(xs128pp_state* state)
     {
-        static const uint64_t JUMP[] = { 0xdf900294d8f554a5, 0x170865df4b3201fc };
+        AMSCU_CONST static const uint64_t JUMP[] = { 0xdf900294d8f554a5, 0x170865df4b3201fc };
         uint64_t low = 0;
         uint64_t high = 0;
         int I;
diff --git a/src/amsculib3/util/amscu_cputhreading.cu b/src/amsculib3/util/amscu_cputhreading.cu
new file mode 100644
index 0000000..4b11003
--- /dev/null
+++ b/src/amsculib3/util/amscu_cputhreading.cu
@@ -0,0 +1,26 @@
+#include <amsculib3/amsculib3.hpp>
+
+namespace amscuda
+{
+namespace util
+{
+
+    int amscpu_cputhreading_threadplan(int probsize)
+    {
+        int nthreads = 1;
+        int ta = std::thread::hardware_concurrency();
+
+        if(probsize>1024)
+        {
+            nthreads = probsize/1024;
+            
+            if(nthreads>ta-2) nthreads = ta-2;
+            if(nthreads>amscuda::amscu_defcputhreads) nthreads = amscuda::amscu_defcputhreads;
+            if(nthreads<1) nthreads = 1;
+        }
+
+        return nthreads;
+    }
+
+};
+};
\ No newline at end of file
diff --git a/src/main.cu b/src/main.cu
index 1c6254e..c7be39f 100644
--- a/src/main.cu
+++ b/src/main.cu
@@ -23,7 +23,7 @@ int main(int argc, char* argv[])
 
     //test_amscurarray1();
 
-    random::amscurand_tests1();
+    //random::amscurand_tests1();
 
     return 0;
 }
\ No newline at end of file