Determine the respective last digit and the first digit (reading left to right) in the base ten expansion of


23²³²³²³

Remember that this is evaluated starting at the top-right and proceeding down and to the left.

   10   A=modpow(23,23,1000000)
   20   B=modpow(23,A,1000000)
   30   C=modpow(23,B,1000000)
   40   print C

finds the last six digits as

 ...606247

 

Posted by Charlie on 2013-11-15 12:16:03