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The first base in which KJIHGFEDCBA987654321 is a prime. All shorter such strings achieve prime status in much smaller bases (192 is the maximum required), and not until the string (110)(109)(108)...321 is a higher base required. [Merickel]

 

  Submitted: 2010-02-04 20:58:23;   Last Modified: 2010-02-05 06:39:40.



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