Hi Gerard,

you are not going to be able to do it directly. Visual FoxPro can handle numbers up to 9007199254740992 (2^53) in exact computations, that is 16 digits.

You can use scientific notation for numbers larger than those ones, but you won't get accuracy for 30 digits, as it has accuracy for 16 decimal places (as the help file says, LOG10(2^53) = 15.95 decimal digits accuracy).


>Hi.
>I need to be able to do Mod(MyNum,97)
>But Mynum, whcih results from a string of digits, could be more than 30 characters
>(This is part of a Banking Application to generate an IBAN check Digit )
>
>Can Foxpro do this correctly
>I've done a few tests with a long number and it does not seem to work
>( I know one option is to take up to 7 characters at a time and do it this way but wonder if this can be avoided)
>
>Tia
>Gerard