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It's called the Luhn algorithm, and no, the site doesn't seem to use it. https://en.wikipedia.org/wiki/Luhn_algorithm https://en.wikipedia.org/wiki/Luhn_algori
by nwh 13y ago
It's called the Luhn algorithm, and no, the site doesn't seem to use it.
https://en.wikipedia.org/wiki/Luhn_algorithm https://en.wikipedia.org/wiki/Luhn_algorithm