237091domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that q-p = 46, where q is the next prime after p.at n=23A134122a(n) is the smallest prime p whose decimal expansion begins with n and is such that the next prime is p+2n, or -1 if no such prime exists.at n=22A308438Prime numbersat n=20991