For example, 137 is a primeval number because using its digits it is possible to write 11 primes, namely, 3, 7, 11, 13, 17, 31, 37, 73, 137, 173, and 317, and it not possible to obtain 11 or more primes using the digits of any other smaller number.
The 100 primeval numbers are known. The first are 1, 2, 13, 37, 107, 113, 137, 1013, 1037, 1079, 1237, 1367, 1379, 10079, 10123, 10136, 10139, 10237, 10279, 10367, 10379, 12379 more terms
Using the digits of the 100-th primeval number (101234567789) it is possible to write 18451445 distinct primes.