84523domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 3 iterations of function f(x) = 3x + 4.at n=33A023278Primes p such that continued fraction of (1 + sqrt(p))/2 has period 14: primes in A146337.at n=27A146359Numbers k such that both k and k + 3 are consecutive deficient numbers.at n=22A317049Prime numbersat n=8241