275813domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of function f(x) = 5x + 4.at n=28A023314Let p(k) = k-th prime; sequence gives primes q of the form q = k*p(k) + 1 for some k.at n=19A096064Prime numbersat n=24105