Hey, Doc...
The term paranoid is inappropriate in this context. Paranoia refers to an irrational fear, while I am expressing a rational concern over a system that has been taken over by a (partially) government funded university and which has not been properly verified. The history of cryptography (as they say) is (quite literally) littered with the dead bodies of people killed because somebody else thought a cryptosystem was good enough when it was not.
If you are concerned that someone put a whole or backdoor in PGP, then go grab the source and take a look for yourself. Thats why the code is available. If you can't understand it, then you probably have no real right to complain! However if you are still paranoid (and yes, I do believe this is an irrational fear, being the person who maintains the MIT PGP development sources) then go find someone who can understand it and ask them. As a side note, PGP does not go out of its way to choose "good" primes over other primes. Take a look at genprime.c and read the comment near the top of the file. It explains why. -derek