The book is now available! 22222223333355757
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

                                                          2222222 3333355757
+ The smallest prime containing only the prime-digits (2, 3, 5, 7) repeated 7, 5, 3, 2 times, respectively. [Green]




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