80935103domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 170 = nextprime(p)-p.at n=2A204805Smaller 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=16A381372Prime numbersat n=4720834