What Is the Luhn Algorithm? The Math Behind Credit Card Transactions Find out how this simple algorithm from the 1960s catches your typos ...

How does Luhn’s algorithm know when your fingers fumble? Every digit in a credit card number contributes a one-digit number to the final sum in the algorithm.

Discover how a century-old Russian math feud led to the creation of Markov chains, shaping everything from Google's trillion-dollar algorithm to modern AI.