566348087domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes followed by a gap of 200 = nextprime(p) - p.at n=5A204807Smaller 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=19A381510Prime numbersat n=29657240