1338241domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that (p+1)/2, (p+2)/3, (p+3)/4 and (p+4)/5 are also prime.at n=8A204592Numbers k such that tau(k) + tau(k+1) + tau(k+2) + tau(k+3) + tau(k+4) = 20, where tau is the number of divisors function A000005.at n=34A350699Prime numbersat n=102719