135045091domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that q-p = 180, where q is the next prime after p.at n=6A204673Smallest of two consecutive primes p and q, both ending with 1, such that q - p = 10n, or -1 if no such primes exist.at n=17A380785Prime numbersat n=7647895