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Let R(n)=(10^n-1)/9. As of December 2003,
34*R(36400)-42000040044444004000024*10^2264*R(36400)/R(4550)-1 was the largest known palindromic prime, all of whose decimal digits are prime. Its formula and proof are described in PrimeForm. [Broadhurst]

 

  Submitted: 2003-12-12 10:09:34;   Last Modified: 2008-01-30 11:28:00.



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