6085441domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the smallest prime p of the form 4k+1 such that nextprime(p) - p = 4n.at n=29A082099Primes followed by a gap of 120.at n=2A204672Smallest of two consecutive primes p and q, both ending with 1, such that q - p = 10n, or -1 if no such primes exist.at n=11A380785Prime numbersat n=418300