"Dana DeLouis" wrote in message
...
2^480

Can anybody help me to get a true calculation...

Here's the answer. This took 0.3 seconds with Excel vba calling the ATP.
It's much faster if you use your own routines.
2^480 =
31217485503159922313815972297931663057485981426649 71150859156959625371738819765620120306103063491971 159826931121406622895447975679288285306290176

Interesting! Could you please expand a little on how you did this? I
hadn't realised that one could bypass Excel's 15 significant figure limit.
--
David Biddulph