I'm pretty sure that in the past, the government would pay money for large prime numbers to use for encoding purposes. I don't know if they still do but they used to pay 1000 dollars (I think it was 1000) for primes over 100 digits.
I Don't Believe in Imaginary Property writes "F-Secure is reporting that there are two new Mac OS X trojans. The first is just a proof-of-concept from the MacShadows people that takes advantage of the unpatched ARDAgent vulnerability to get root access when run by the user. The second relies on social engineering: it's a poker game that requests the user's password, claiming to have detected a 'corrupt preference file.' It then takes control of the computer. Now that the source of the proof-of-concept is publicly available, we can expect that future trojans won't just politely request your password."