16691693domain: NPropertiesPrimalityPrimeyesAppears in sequencesJuxtaposition of prime(2n-1) and prime(2n) is a prime.at n=21A152521Terms of A030461 that give successive gap records.at n=4A267692a(n) is the least term of A030461 with gap = 6*n between consecutive primes or 0 if no such term exists.at n=3A267721Prime numbersat n=1072723