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1377 is the smallest number which is sum of different primes using all the ten digits twice (1377 = 409 + 401 + 283 + 89 + 67 + 61 + 53 + 7 + 5 + 2). [Capelle]

 

  Submitted: 2005-07-06 04:43:18;   Last Modified: 2008-01-30 11:28:00.



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