2260889domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that 2p^2-1, 3p^2-2, 4p^2-3, and 5p^2-4 are also prime.at n=27A213107Primes p such that 2p^2-1, 3p^2-2, 4p^2-3, 5p^2-4 and 6p^2-5 are also prime.at n=1A213125Prime numbersat n=166843