700573domain: NPropertiesPrimalityPrimeyesAppears in sequencesGreater of twin primes of the form x^2+2, x^2+4.at n=18A085554Primes p of the form x^2+4, such that either p-2 or p+2 is prime.at n=22A085555Smallest prime p == 5 (mod 8) such that Q(sqrt(p)) has class number 2n+1.at n=30A355877Prime numbersat n=56587