68669domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes having only {0, 6, 8, 9} as digits.at n=25A053580Numbers n such that n, 2n+1, 3n+2, 4n+3 are primes.at n=22A067257Primes having only {6, 8, 9} as digits.at n=11A385800Prime numbersat n=6825