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It is conjectured that you can always arrange the numbers from 1 to 2n in a circle so that every pair of adjacent numbers adds to a prime. Antonio Filz called this circular permutation a Prime Circle. This prime gives one solution (starting with 10) when n = 5. [Caldwell]

 

  Submitted: 2008-03-07 08:41:04;   Last Modified: 2008-11-27 14:45:59.



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