10533599domain: NPropertiesPrimalityPrimeyesAppears in sequencesQuatro-safe primes.at n=24A157359Numbers k where records occur for d(k+1)/d(k), where d(k) is A000005(k).at n=37A282531Numbers k achieving record deficiency via a residue-based measure, M(k) = (k+1)*(1 - zeta(2)/2) - 1 - ( Sum_{j=1..k} k mod j )/k.at n=29A362082Prime numbersat n=697670