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Everything about Check digit

Error detection for identification numbers

A check digit is a form of redundancy check used for error detection on identification numbers, such as bank account numbers, which are used in an application where they will at least sometimes be input manually. It is analogous to a binary parity bit used to check for errors in computer-generated data. It consists of one or more digits computed by an algorithm from the other digits in the sequence input. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Check digitA 5-minute orientation
  2. Skim a recent paper: Artificial intelligence in digital pathology — time for a reality checkInfluential work since 2022
  3. Pick up a classic book: Writing to learn identification numbersThe most-reprinted book on the subject
  4. Read the landmark paper: A new class of check-digit methods for arbitrary number systems (Corresp.)Cited 26 times
  5. Go sideways: Luhn mod N algorithmA closely related topic
  6. Go sideways: Luhn algorithmA closely related topic

📖 Definitions

Noun A single-digit checksum.

🗂️ The subject at a glance

  1. Design
  2. Examples
  3. Algorithms

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics