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Squaring the palindromic prime 32423 (note Honaker's sum) gives the 10-digit integer 32423^2 = 1051250929, which consists of two 0's, two 1's, two 2's, two 5's, and two 9's (one each in ascending order gives the 2*2-digit prime 01259). It truncates on one side to the concatenation of 3 ninth-powers (1,0,512) and on the other to the palindrome 929. The reversal of 1051250929 is 9290521501, which is prime. [Post]

 

  Submitted: 2004-11-06 09:46:21;   Last Modified: 2008-12-18 21:32:40.



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