52417601domain: NPropertiesPrimalityPrimeyesAppears in sequencesHonaker primes of the form k^2 + 1.at n=25A176790Primes of the form n^2 + 1 such that (n - 1)^2 + 1 and (n + 1)^2 + 1 are semiprimes.at n=18A234693Prime numbersat n=3137327