381853domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p for which exactly six bases b with 1 < b < p exist such that p is a base b Wieferich prime.at n=23A255209a(n) is the first prime p such that q*r mod p = q*r mod s = 12*n, where q,r,s are the next three primes after p.at n=28A338615Prime numbersat n=32439