The book is now available! 66666...66667 (66-digits)
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

    666666 6666666666 6666666666 6666666666 6666666666 6666666666 6666666667
+ A prime formed from sixty-six 6's plus 1. [Silva]

+ The 66-digit number 6*(10^66-1)/9+1, successor of the number having 66 digits "6", is prime. It is the 66/6=11-th prime of this form (successor of a repdigit "6"), while there are 22 smaller primes of the more general form m*(10^n-1)/9+1. [Hasler]




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