swrng -dd -fn STDOUT -nb 12000000000 | ent Entropy = 8.000000 bits per byte. Optimum compression would reduce the size of this 12000000000 byte file by 0 percent. Chi square distribution for 12000000000 samples is 261.93, and randomly would exceed this value 36.94 percent of the times. Arithmetic mean value of data bytes is 127.4996 (127.5 = random). Monte Carlo value for Pi is 3.141628214 (error 0.00 percent). Serial correlation coefficient is 0.000016 (totally uncorrelated = 0.0).