616991domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 5 iterations of function f(x) = 9x + 8.at n=15A023354Primes p for which pi_{4,3}(p) < pi_{4,1}(p), where pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).at n=10A199547Prime numbersat n=50389