306099181domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 190 = nextprime(p)-p.at n=6A204806Smallest 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=18A380785Prime numbersat n=16564768