The book is now available! 33333331
(another Prime Pages' Curiosity)
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The last of the sequence 31, 331, 3331, 33331, 333331, 3333331, 33333331 that are all primes. The next prime of this form has 18 digits. [Ludovicus]

 

  Submitted: 2009-03-01 05:37:21;   Last Modified: 2010-08-12 12:36:31.



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