7523

This number is a prime.

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The only prime q of form q=4p+7, consisting of distinct prime digits, with p being also an emirp with distinct digits, (p=1879), of the same form, 4*n+7, (n=468). [Loungrides]

Submitted: 2014-03-28 18:17:08; Last Modified: 2018-12-21 13:29:10.