The book is now available! 77777...77777 (49-digits)
(another Prime Pages' Curiosity)
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                       777777773 3333773777 3773737377 3777377333 3377777777
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      7 7 7 7 7 7 7
      7 3 3 3 3 3 7
      7 3 7 7 7 3 7
      7 3 7 3 7 3 7
      7 3 7 7 7 3 7
      7 3 3 3 3 3 7
      7 7 7 7 7 7 7
The only square-congruent prime of order 7 that contains two prime digits. [Hartley]

 

  Submitted: 2003-02-07 21:30:41;   Last Modified: 2008-01-30 11:28:00.



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