78517domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form k^2 + prime(k) + 1.at n=21A063461Primes p such that 2p + 3, 4p + 9, 3p + 2 and 9p + 8 are also primes.at n=27A176619Prime numbersat n=7705