128469149domain: NPropertiesPrimalityPrimeyesAppears in sequencesInitial members of prime septuplets (p, p+2, p+8, p+12, p+14, p+18, p+20).at n=21A022010Primes p such that p + 32 is also prime and there are seven primes between p and p + 32.at n=13A086149Prime numbersat n=7296086