[rootw0rm]

I actually have several TB of OpenSSL PRNG output (256 bit len) that I've been analyzing. A fairly modest sample size, but I've come across some interesting patterns at the bit level. It's kind of a pain in the ass to write efficient analytics for a binary 256 bit pattern as a matter of fact.

[dchest]

That's numerology, you just have many outputs of SHA1 with different inputs.

[ICallsBS]

10^9 out of 10^25 different combinations is a significant sample size? Wouldn't the law of small numbers apply in this case?