The book is now available! 3581
(another Prime Pages' Curiosity)
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The smallest prime p for which all the decimal digits of 31p are either zeros or ones (31 * 3581 = 111011). The next few primes of this type are 3583871, 32290681, 326132581, ... . [Keith]

 

  Submitted: 2012-04-17 21:00:45;   Last Modified: 2012-04-17 21:02:05.



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