151303domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes which are the concatenation of a prime p and 2p+1.at n=10A168166Primes p that set a new record for the size of the smallest prime q such that q^(p-1) == 1 (mod p^2), i.e., such that p is a base-q Wieferich prime.at n=40A289379Prime numbersat n=13960