Don
It?s very difficult to find online a calculator
for lenghty combinatorics like the ones neccessary to solve the bingo lottery problem at
bjmath. Try better this:

Hewlett Packard STAT/MATH calculator Model 21s.
It?s amazing good with the boundaries for overflow between +/- 9.99999999999 * 10^499.
I solved your formula using this.

Btw, I didn?t want to put this message there,
something I?m sure you?ll understand.

Sincerely
Z