778777domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that contain digits 7 and 8 only.at n=13A020470Primes of the form n+(n+3)^3, n>=0.at n=20A162004Near-repdigit emirps.at n=35A173594The larger member of a near-repdigit emirp pair.at n=16A173596Primes having only {0, 7, 8} as digits.at n=27A385771Prime numbersat n=62381