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The sum of digits of the sum of 13 first primes (238) is 13 (prime) and the sum of digits of the sum of 19 first primes (568) is 19 (prime). Note that 1913 is also prime. [Gallardo]

 

  Submitted: 2003-03-17 19:40:55;   Last Modified: 2008-01-30 11:28:00.



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