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A palindromic prime of prime digit-length constructed around a central three-digit palindromic prime, namely 787, and extended to the right with the next consecutive primes up to 5639 and to the left extended with the mirror image of this extended concatenation. [Raghuramaiah]

 

  Submitted: 2016-08-22 09:20:21;   Last Modified: 2016-08-24 20:08:21.



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