The book is now available! 66666...99999 (30-digits)
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

                                            6666667777 7778888888 8999999999
+ The only prime formed from four consecutive digits d with repeating each digit d times. [Loungrides]

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