3279841domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the smallest prime p of the form 4k+1 such that nextprime(p) - p = 4n.at n=26A082099Smallest prime p(i) such that between 2p(i) and 2p(i+1) there exist n primes.at n=22A104380Prime numbersat n=235578