394059907domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 190 = nextprime(p)-p.at n=11A204806Smaller of two consecutive primes p and q, both ending with 7, such that q - p = 10n, or -1 if no such primes exist.at n=18A381510Prime numbersat n=21036263