161839domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of function f(x) = 5*x + 6.at n=31A023315Prime divisors of solutions to 10^n == 1 (mod n).at n=15A066364Primes of the form (k^3 - k^2 - k - 1)/2 for some integer k > 0.at n=14A268063Prime numbersat n=14838