2999

This number is a prime.

The fourth term of the sequence 2, 11, 29, 2999, ... , where each term (starting with the first prime) is the smallest prime, greater than the previous term, which contains a sum of digits equal to the previous term. The fifth term (5 * 10^333 - 10^332 - 10^174 - 1) was found by Jim Fougeron of Omaha, Nebraska.