12277...77777 (125-digits)
This number is a prime.
12277 7777777777 7777777777 7777777777 7777777777 7777777777
7777777777 7777777777 7777777777 7777777777 7777777777 7777777777 7777777777
The smallest prime greater than a googol consisting of a
number n followed by n 7's. [Loungrides]
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