The book is now available! 2099
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The next self prime year is 2099. A self number (or Columbian number) is an integer which cannot be generated by any other integer added to the sum of its digits (e.g., 25 is not a self number because 25 = 17+1+7). These were first described in 1949 by the Indian mathematician D. R. Kaprekar.


  Submitted: 2006-12-18 23:15:31;   Last Modified: 2008-07-31 18:18:37.

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