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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 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.
(There is one curio for this number that has not yet been approved by an editor.) To link to this page use /curios/page.php?number_id=6769
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