34434343domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that contain digits 3 and 4 only.at n=27A020461Primes containing only two distinct digits whose sum of digits is 28, the second perfect number.at n=20A048518Primes consisting only of digits 3 and 4 occurring with equal frequency.at n=1A087529Prime numbersat n=2114208