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.

(In reply to re(2): The last few digits of a smaller number by Charlie)

True, because WolframAlpha interprets the input 23^23^23^23 as 23^(23^(23^23)).  My error was in not realising this when I attempted the second part.

Posted by broll on 2013-11-18 00:46:42