Excel only lets 15 digits be used in numbers To have the 16th number most
people use text.

"scubadave" wrote:

> I am trying to format cells to input credit card numbers in Excell 2000.
> When I set up a custom number format for four sets of four numbers
> (####-####-####-####) the result always changes the last number to a 0. How
> do I overcome that?