865957domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime p such that first n primes (p_1=2, ..., p_n) are 7th power residues mod p.at n=3A002227Primes p such that 2p - 1, 3p - 2, (p + 1)/2, and (p + 2)/3 are also prime.at n=21A386540Prime numbersat n=68794