# 2341

This number is a prime. Fermilab has a Deep Underground Lab looking for dark matter. It is 2341 feet underground. [McCranie] The only prime containing the first four digits formed from two double-digit primes. [Silva] The only prime consisting of four distinct consecutive digits that can be represented as the sum of consecutive palindromic primes, i.e., 757+787+797 = 2341. [Loungrides] Concatenate (right-to-left) the 2nd, 3rd, 4th and 1st prime and you will get another prime of the same digital length containing all of the prime digits, i.e., 2753. [Loungrides] The largest prime derangement of {1, 2, 3, 4}. (A derangement is a permutation in which none of the objects appear in their ordered place.) [Loungrides] The only prime consisting of four successive digits that is also a concatenation of two double-digit primes, (23, 41). The other twelve primes that consist of four successive digits are: 1423, 2143, 2543, 4231, 4253, 4523, 4567, 4657, 5647, 5867, 6547 and 6857. [Loungrides] There are exactly 666 fours in the first 2341 positive integers. [Gaydos]