4208189

This number is a prime.

Consider a "prime race" based on the last two digits of the primes, where we count how many primes there are (up to some prime p) having each of the following forms: 100k + {1, 3, 7, 9, 11, 13, 17, 19, 21, 23, 27, 29, 31, 33, 37, 39, 41, 43, 47, 49, 51, 53, 57, 59, 61, 63, 67, 69, 71, 73, 77, 79, 81, 83, 87, 89, 91, 93, 97, or 99}. 4208189 is the first prime at which all 40 counts are distinct (i.e., no racers are tied). [Gaydos]