641519domain: NPropertiesPrimalityPrimeyesAppears in sequencesSuper-8 Numbers (8 * n^8 contains substring '88888888' in its decimal expansion).at n=1A032748Primes of the form (k^3 - k^2 - k - 1)/2 for some integer k > 0.at n=22A268063Prime numbersat n=52187