The book is now available! 77777...77723 (25-digits)
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

                                                 77777 7777777777 7777777723
+ The largest prime, less than a googol, formed by n 7's followed by the integer n (n=23). [Loungrides]

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