1515541domain: NPropertiesPrimalityPrimeyesAppears in sequencesLargest number in the orbit of n under iteration of the map A125256: x -> smallest odd prime divisor of n^2+1.at n=57A294657Hypotenuses of primitive Pythagorean triangles two sides of which are Pythagorean primes.at n=22A308341Prime numbersat n=115274