Luhn Algorithm
A checksum formula used to validate card numbers.
17 July 2025
1 min read
The Luhn algorithm is a modulus-10 checksum used by card networks to validate the structural integrity of card numbers and detect typos or fraud.
A checksum formula used to validate card numbers.
The Luhn algorithm is a modulus-10 checksum used by card networks to validate the structural integrity of card numbers and detect typos or fraud.