The book is now available! 979691939
(another Prime Pages' Curiosity)
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979691939 is a prime factor of 1223334444555556666667777777666666555554444333221. Note that it alternates between a 9 and non-9 digits. [Axoy]

 

  Submitted: 2004-08-02 10:40:21;   Last Modified: 2008-01-30 11:28:00.



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