Not Mersenne primes though. There are only a few of them, and it would be trivial to check if any of them are used as primes. The whole point of encryption sche

Not Mersenne primes though. There are only a few of them, and it would be trivial to check if any of them are used as primes. The whole point of encryption schemes that use prime numbers is that the attacker doesn't know which primes are used.