128621domain: NPropertiesPrimalityPrimeyesAppears in sequencesSecond prime factor of x = 3^p - 2^p when p is prime and omega(x) >= 2.at n=19A089163Primes of the form 3n^3-4.at n=3A200848Primes p such that (5*p+2)/3 is the square of a prime.at n=20A357199Prime numbersat n=12042