121039domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of function f(x) = 3x + 2.at n=9A023307Primes p such that p^2 + 6, p^2 + 12 and p^2 + 18 are all prime.at n=20A173627Primes of the form 2n^2 + 7.at n=24A201475Primes of the form 8*k^2 + 7.at n=13A201704Prime numbersat n=11395