1307

This number is a prime.

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The smallest prime that can be represented as the sum of the numbers formed by repeating twice each of first n composite numbers, 4, 6, 8, 9, 10, (n=5), i.e., 1307 = 44 + 66 + 88 + 99 + 1010. [Loungrides]

Submitted: 2017-02-13 18:08:25; Last Modified: 2020-07-27 16:11:52.