322727domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of function f(x) = 5x + 4.at n=32A023314Prime-indexed primes (PIPs) whose digits are all primes.at n=29A087368Maximal sequence of primes whose digits are primes and whose digit sum is also a term.at n=34A360497Prime numbersat n=27827