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The smallest emirp formed by concatenating the divisors of an emirp (13). Note that the latter itself is the concatenation of the divisors of a prime (3), and that concatenating the divisors of its reversal forms instead a palindromic prime (131). [Beedassy]

 

  Submitted: 2009-10-17 14:56:04;   Last Modified: 2009-11-04 20:31:36.



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