2005 base 10 is not a square. Neither is 2005 base 7 a square (equal 2*7^3+5=691). Is there any base b such that 2005 base b is a square?

(In reply to re(2): Solution by Bruno)

And, certainly, Robby's solution is much more concise than that Richard and I obtained.

Posted by pcbouhid on 2005-06-01 00:35:35