Use this tool to quickly verify credit card numbers.

Use this tool to quickly verify credit card numbers.

The Luhn algorithm, also known as the modulus 10 algorithm, is a simple checksum formula used to validate various identification numbers, such as credit card numbers, IMEI numbers, and social security numbers. It is widely employed to detect errors or discrepancies in these numerical codes.

The algorithm works by calculating a check digit, which is appended to the original number. This check digit is derived through a series of mathematical operations performed on the digits of the original number. The resulting value is then compared to a specified validation criteria.

The Luhn algorithm provides a quick and efficient method to determine the validity of a given number. It can detect common input errors, such as transposed digits or accidental typos, as well as some instances of fraudulent or invalid numbers.

The algorithm is relatively straightforward and can be implemented using basic arithmetic operations. Due to its simplicity and effectiveness, the Luhn algorithm is widely used in various industries that rely on accurate and secure identification numbers, serving as a fundamental tool for data validation and integrity checks.