206953domain: NPropertiesPrimalityPrimeyesAppears in sequencesInitial prime of exactly nine consecutive primes congruent to 1 modulo 4.at n=1A162865(A192249)/5.at n=13A192069First in a sequence of 9 consecutive primes all of the form 4n+1.at n=1A226905Prime numbersat n=18546