439573domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 9n^2 + 4.at n=29A201706Smallest prime p == 5 (mod 8) such that Q(sqrt(p)) has class number 2n+1.at n=20A355877Smallest p == 1 (mod 4) such that Q(sqrt(p)) has class number 2n+1.at n=20A355878Prime numbersat n=36904