yeah, me too, except didn't even realize the mistake until dawh pointed it out above. you're right about my extra unneeded parens as well. D'oh! does seem unreality's is greatest but as to largest possible, would think you could substitute one ^9 for a !! somewhere and get a greater number yet. As to where within the 100 digits is an interesting problem. and if one exponent makes it bigger, would another ^9 and a set of parens be greater yet? and then... yikes, big numbers, small tired brain. has been fun to think about...