Gervase Markham wrote:
HJ wrote:
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
Just do a search for: ANSI X4.13 and/or ISO/IEC 7812-1:1993
/HJ
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