122203domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of function f(x) = 4x + 9.at n=29A023312Prime numbers containing the string 222.at n=25A166580Numbers k such that (8*10^k + 43)/3 is prime.at n=22A293538Prime numbersat n=11495