160207domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of function f(x) = 2x + 3.at n=31A023303Primes of the form 5*k^2 + 2, k >= 0.at n=24A201481Primes of the form: concatenation n with n-th composite integer.at n=10A246801Prime numbersat n=14703