71881domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that k and k^2 use only the digits 1, 5, 6, 7 and 8.at n=8A137060Primes of the form 2n^3+7.at n=12A201110Least prime p such that 2*prime(p*n)+1 = prime(q*n) for some prime q.at n=19A260882Primes having only {1, 7, 8} as digits.at n=41A260892Prime numbersat n=7115