Testing Go's math/rand with PractRand (using https://github.com/flyingmutant/rand/tree/master/misc/practrand)

practrand-std-ExpFloat64.txt

> ./practrand -gen=std -transform=exp | PractRand stdin64 -multithreaded
RNG_test using PractRand version 0.95
RNG = RNG_stdin64, seed = unknown
test set = core, folding = standard (64 bit)

rng=RNG_stdin64, seed=unknown
length= 256 megabytes (2^28 bytes), time= 3.0 seconds
  no anomalies in 213 test result(s)

rng=RNG_stdin64, seed=unknown
length= 512 megabytes (2^29 bytes), time= 7.1 seconds
  no anomalies in 229 test result(s)

rng=RNG_stdin64, seed=unknown
length= 1 gigabyte (2^30 bytes), time= 13.6 seconds
  Test Name                         Raw       Processed     Evaluation
  FPF-14+6/16:all                   R=  +5.2  p =  2.1e-4   unusual          
  ...and 245 test result(s) without anomalies

rng=RNG_stdin64, seed=unknown
length= 2 gigabytes (2^31 bytes), time= 25.4 seconds
  Test Name                         Raw       Processed     Evaluation
  FPF-14+6/16:(0,14-0)              R=  +7.8  p =  7.8e-7   mildly suspicious
  FPF-14+6/16:all                   R= +13.9  p =  1.6e-12    FAIL           
  [Low16/64]FPF-14+6/16:(0,14-0)    R=  +7.1  p =  3.6e-6   unusual          
  [Low16/64]FPF-14+6/16:all         R=  +8.6  p =  1.3e-7   very suspicious  
  ...and 259 test result(s) without anomalies

practrand-std-NormFloat64.txt

> ./practrand -gen=std -transform=norm | PractRand stdin64 -multithreaded
RNG_test using PractRand version 0.95
RNG = RNG_stdin64, seed = unknown
test set = core, folding = standard (64 bit)

rng=RNG_stdin64, seed=unknown
length= 256 megabytes (2^28 bytes), time= 3.2 seconds
  no anomalies in 213 test result(s)

rng=RNG_stdin64, seed=unknown
length= 512 megabytes (2^29 bytes), time= 7.3 seconds
  no anomalies in 229 test result(s)

rng=RNG_stdin64, seed=unknown
length= 1 gigabyte (2^30 bytes), time= 14.6 seconds
  Test Name                         Raw       Processed     Evaluation
  [Low16/64]FPF-14+6/16:all         R=  +5.4  p =  1.3e-4   unusual          
  ...and 245 test result(s) without anomalies

rng=RNG_stdin64, seed=unknown
length= 2 gigabytes (2^31 bytes), time= 26.9 seconds
  Test Name                         Raw       Processed     Evaluation
  FPF-14+6/16:(0,14-0)              R=  +7.4  p =  1.7e-6   unusual          
  FPF-14+6/16:all                   R= +13.7  p =  2.5e-12    FAIL           
  [Low16/64]FPF-14+6/16:(0,14-0)    R=  +8.5  p =  1.6e-7   mildly suspicious
  [Low16/64]FPF-14+6/16:(1,14-0)    R=  +8.6  p =  1.4e-7   mildly suspicious
  [Low16/64]FPF-14+6/16:all         R= +10.0  p =  6.8e-9   very suspicious  
  ...and 258 test result(s) without anomalies

practrand-std-Uint64.txt

> ./practrand -gen=std | PractRand stdin64 -multithreaded
RNG_test using PractRand version 0.95
RNG = RNG_stdin64, seed = unknown
test set = core, folding = standard (64 bit)

rng=RNG_stdin64, seed=unknown
length= 512 megabytes (2^29 bytes), time= 2.3 seconds
  Test Name                         Raw       Processed     Evaluation
  [Low4/64]BCFN(2+4,13-5,T)         R= +13.2  p =  2.2e-5   unusual          
  [Low1/64]BCFN(2+2,13-6,T)         R= +90.6  p =  1.8e-31    FAIL !!!       
  [Low1/64]BCFN(2+3,13-6,T)         R= +70.9  p =  1.0e-24    FAIL !!        
  [Low1/64]BCFN(2+4,13-6,T)         R= +34.1  p =  3.9e-12    FAIL           
  [Low1/64]BCFN(2+5,13-7,T)         R= +16.5  p =  1.3e-5   unusual          
  ...and 224 test result(s) without anomalies