Be aware that a decent prng will look just like the true one. That one's particularly crap. The Mersenne Twisters have incredibly long periods (2^19937 - 1 comm

Be aware that a decent prng will look just like the true one. That one's particularly crap. The Mersenne Twisters have incredibly long periods (2^19937 - 1 common) and you won't see anything. These are not at all cryptographically secure.