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345*216^5595+1 is prime. Note that 216 = 3^3 + 4^3 + 5^3 = 6^3; the smallest cube that is also the sum of three cubes, while 5595 has three distinct palindromic factors. [Earls]

 

  Submitted: 2004-09-02 07:02:46;   Last Modified: 2008-01-30 11:28:00.



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