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Smallest emirp with emirp number of digits and emirp sum of digits. 1000000001159 is prime, and R(1000000001159) = 951100000000 is prime, and sod(1000000001159) = 17 is prime, and R(17) = 71 is prime, and 13 digits in length is prime and R(13) = 31 is prime. [Post]

 

  Submitted: 2009-11-19 11:47:59;   Last Modified: 2009-11-20 18:25:55.



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