71880637domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 160 = nextprime(p)-p.at n=3A184984Smaller 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=15A381510Prime numbersat n=4222091