23

This number is a prime.

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(2^9 + 3^8 + 5^7 + 7^6 + 11^5 + 13^4 + 17^3 + 19^2 + 23^1) + 1 is prime. [Wiszowaty]

Submitted: 2019-01-15 08:48:17; Last Modified: 2019-01-15 15:44:04.