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Bargaineering #17 - Luhn Algorithm

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Uploaded by on Oct 17, 2009

In this Bargaineering.com Videocast, Jim Wang explains how the Luhn Algorithm works, which is a modulus 10 checksum you can use on credit card numbers to verify correctness.

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Education

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Standard YouTube License

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  • The math in this is wrong. The "10" that you add in should be 1 + 0 = 1. Your checksum of 6 is wrong. Here's the correct sequence:

    546124355

    That's 5 + (4+4) + 6 + (1+1) + 2 + (4+4) + 3 + (1+0) = 35

    35%5 = 5, so the last digit is 5, which it is!

    PLEASE fix the video or take it down.

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