A credit card number can be as long as 19, 6 for the issuer, 12 for the account number and 1 for the checksum.
Ah, OK. Do you have a reference to a document describing the format and the checking algorithm? I assume there is one, as sites do check for valid numbers.
Gerv _______________________________________________ Mozilla-security mailing list Mozilla-security@mozilla.org http://mail.mozilla.org/listinfo/mozilla-security