The book is now available! 11111...11111 (81-digits)
(another Prime Pages' Curiosity)
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                                                                1 1111111111
1111111111 1111111111 1111111116 1111111111 1111111111 1111111111 1111111111
+

1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 6 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1

The smallest near-repdigit square-congruent prime of order 9. [Hartley]

(There are 2 curios for this number that have not yet been approved by an editor.)




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