3

This number is a prime.

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In a paper dated 19 Feb 2016, authors J. Cilleruelo, F. Luca, L. Baxter proved any positive integer is the sum of 3 palindromes in base 5 or beyond. [Beedassy]

Submitted: 2018-09-19 16:57:36; Last Modified: 2019-02-01 12:33:44.