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    Bank card number validation

    The calculator checks a bank card number using Luhn algorithm, it also determines the card issuer according to Issuers handbook.

    PLANETCALC, Bank card number

    Bank card number

    • Luhn algorithm

      Calculates digit sequence checksum using Luhn algorithm (mod 10), calculates validation digit (the digit to be appended to the digit sequence to make whole sequence checksum equal to zero).

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