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A palindromic prime as "father" for a 5-chain (797,179,131,11,2) of primes: sum of squared digits of predecessor has to be a prime again and gives successor which is repeated as long as possible and ends here in only even and smallest prime. [Herault]

 

  Submitted: 2009-05-23 05:05:01;   Last Modified: 2009-05-23 17:35:21.



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