10270451domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 140 = nextprime(p)-p.at n=2A204803Smallest 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=13A380785Prime numbersat n=681370