25877573domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes q of the form q=p^2+4 (p=prime) such that r=q^2+4 is also prime.at n=15A165218Primes q of the form q = p^2 + 4 (p prime) such that r = q^2 + 4 and t = r^2 + 4 are also prime.at n=0A231120Prime numbersat n=1617338