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Credit card numbers that conform to the Luhn formula (MOD 10 check).

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In order to complete a purchase a combination of data must be had, and merely a card number is not enough.

This is an algorithm specifically designed to prevent accidental errors such as typos.

Knowing the Major Industry Identifier (MII) and the Issuer Identification Number (IIN) we can prefix a credit card number and then randomly select the rest, as long as they comply to the MOD 10 algorithm.

A valid credit card number (also known as Primary Account Number - PAN) has several fields and each of them has a meaning.

For the technically inclined, this number complies to the ISO/IEC 7812 numbering standard.

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