The book is now available! 11111...11111 (73-digits)
(another Prime Pages' Curiosity)
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                                                                         111
1111111111 1111111111 1111111111 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 
      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

A repunit star-congruent prime in base 11. [Dobb]




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