Toward the beginning of Neal Stephenson's Cryptonomicon, Avi gives Randy two strings of sixteen supposedly random hexadecimal numbers as encryption keys:
AF 10 06 E9 99 BA 11 07 64 C1 89 E3 40 8C 72 55 67 81 A4 AE FF 40 25 9B 43 0E 29 8D 56 60 E3 2F
If you change the hexadecimals to decimals and change the decimals to letters, modulo 25 without J, like Lawrence does with his one-time-pads later in the book, you get:
z k f h c l r g z s m b o p o k c d o y m o m e r o q q l v b w
The first sequence contains two Os and the second contains three Os. The probability of randomly picking at least five Os out of twenty-five letters given thirty-two picks is less than 1%, which makes it seem like the numbers are not actually random.
Additionally, there are six prime numbers in each sequence:
E9 11 07 C1 89 E3 67 25 43 29 E3 2F
(all primes in base sixteen)
What does this mean?