13

This number is a prime.

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There are thirteen 4-digit primes each consisting of four successive digits, i.e., 1423, 2143, 2341, 2543, 4231, 4253, 4523, 4567, 4657, 5647, 5867, 6547, 6857. [Loungrides]

Submitted: 2019-03-20 10:31:15; Last Modified: 2019-03-21 06:40:08.