14199121domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form (k^4 + 1)/2.at n=15A096170Primes p such that sigma(2p-1) is a prime q.at n=20A247789Primes of the form (p^4 + 1)/2, where p is prime.at n=10A277201Prime numbersat n=922142