The book is now available! 31111...11113 (127-digits)
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              3111111 1111111111 1111111111 1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111113
+ This the 5th number of this form. Note that it has a Mersenne prime number of digits and a palindromic prime digital sum. [Patterson]




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