The first few primeval numbers are 2, 13, 37, 107, 113, 137, 1013, 1037, 1079, 1237, 1367, ... (Sloane's A072857); the number of primes that can be obtained from the primeval numbers is 1, 3, 4, 5, 7, 11, 11, 19, 21, 26, 29, ... (Sloane's A088130). The number of primes that can be obtained from a primeval number with n digits is 1, 4, 11, 31, 106, ... (Sloane's A076730).