9339119domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that (p-1)/2, (p-2)/3, (p-3)/4, (p-4)/5 and (p-5)/6 are prime numbers.at n=1A181680Primes p such that (p-k)/(k+1) is also prime for k = 1, 2, 3, 4.at n=21A247348Prime numbersat n=623611