137

This number is a prime.

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1^1 + 3^3 + 7^7 + 137^2 +/- 1 and 1^1 + 3^3 + 7^7 - 137^2 + 1 are all prime. [Homewood]

Submitted: 2018-05-03 18:15:14; Last Modified: 2018-05-03 18:47:11.