The book is now available! 77777...31313 (27-digits)
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

                                               7777777 7777771313 1313131313
+ Thirteen 7's followed by seven 13's is prime. "Lucky 7" and "Unlucky 13" keeping each other in perfect balance. [De Geest]

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