85381domain: NPropertiesPrimalityPrimeyesAppears in sequencesFirst member of a prime quadruple in a 2p-1 progression.at n=32A057327Smallest primes starting a complete three iterations Cunningham chain of the second kind.at n=20A110024Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 8).at n=37A212367Prime numbersat n=8312