257789053domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 190 = nextprime(p)-p.at n=2A204806Smaller of two consecutive primes p and q, both ending with 3, such that q-p = 10n, or -1 if no such primes exist.at n=18A381372Prime numbersat n=14081818