80866...33001 (109-digits)

This number is a prime.

                                  808665833 5137371778 1208725792 5169162515
6211831304 7513808249 8466207067 0756404736 8962119717 1693778875 0801633001

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(61^61+60^60+...+26^26+25^25) is a prime made up of numbers to their own exponents added together. [Stath]