23

This number is a prime.

Just showing those entries submitted by 'Wiszowaty': (Click here to show all)

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

(There are 4 curios for this number that have not yet been approved by an editor.)