I need to calculate and store in a table some factorial numbers (n!) for n<=30.
For elaboration performance I have to create a "factorial matrix".
I made it using double fields. All work ok,for little number, but the value that is effectively stored and pheraps calculated isn't correct (exact) when they are expressed as exponential. Documentation says that double field precision is (+/-4.94065645841247E-324 to +/-8.9884656743115E307)
30!= in my table is something like 2,6525285981219+E32 but I think that this value don't have enought decimail digits and of course isn't exact.
If I'm not in wrong,how can I operate whit more decimal digits precision.

Thanks in advance
Enrico De Angelis