134217773domain: NPropertiesPrimalityPrimeyesAppears in sequencesSecond smallest prime after 2^n.at n=27A187872Primes of the form 2^n + 45.at n=9A243431a(n) is the smallest prime greater than 2^n such that 2 is a primitive root modulo a(n).at n=27A250396Prime numbersat n=7603555