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  2. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    The Luhn algorithm, also known as the mod 10 algorithm, is a simple formula to validate identification numbers. It involves doubling every second digit, summing the digits, and subtracting the modulus 10 from the sum.

  3. Luhn mod N algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_mod_N_algorithm

    The Luhn mod N algorithm is an extension to the Luhn algorithm (also known as mod 10 algorithm) that allows it to work with sequences of values in any even-numbered base. This can be useful when a check digit is required to validate an identification string composed of letters, a combination of letters and digits or any arbitrary set of N ...

  4. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    A check digit is a redundancy check used for error detection on identification numbers, such as bank account numbers. Learn how check digits are computed, designed ...

  5. Talk:Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Talk:Luhn_algorithm

    Secondly, calculate_luhn returns (10 - something_mod_10). Hence, the results will be between 1 and 10, which is not what we want for a single checksum digit. 216.165.126.85 ( talk ) 01:05, 17 March 2012 (UTC) Reply [ reply ]

  6. MSI Barcode - Wikipedia

    en.wikipedia.org/wiki/MSI_Barcode

    MSI barcode for the number 1234567 with Mod 10 check digit. MSI (also known as Modified Plessey) is a barcode symbology developed by the MSI Data Corporation, based on the original Plessey Code symbology.

  7. Hans Peter Luhn - Wikipedia

    en.wikipedia.org/wiki/Hans_Peter_Luhn

    Hans Peter Luhn (1896-1964) was an American computer scientist and information scientist who invented the Luhn algorithm, KWIC indexing, and selective dissemination of information. He worked for IBM and patented over 80 inventions in various fields.

  8. Modular multiplicative inverse - Wikipedia

    en.wikipedia.org/wiki/Modular_multiplicative_inverse

    However, the linear congruence 4x ≡ 6 (mod 10) has two solutions, namely, x = 4 and x = 9. The gcd(4, 10) = 2 and 2 does not divide 5, but does divide 6. Since gcd(3, 10) = 1, the linear congruence 3x ≡ 1 (mod 10) will have solutions, that is, modular multiplicative inverses of 3 modulo 10 will exist. In fact, 7 satisfies this congruence (i ...

  9. Verhoeff algorithm - Wikipedia

    en.wikipedia.org/wiki/Verhoeff_algorithm

    A decimal checksum for error detection published by Dutch mathematician Jacobus Verhoeff in 1969. It detects all single-digit errors and all transposition errors ...