# Luhn algorithm

> simple checksum formula

**Wikidata**: [Q915402](https://www.wikidata.org/wiki/Q915402)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Luhn_algorithm)  
**Source**: https://4ort.xyz/entity/luhn-algorithm


## References

1. [Source](https://medium.com/lydia-app/aux-origines-de-nos-num%C3%A9ros-de-carte-bancaire-f4d084f96006)
2. Freebase Data Dumps. 2013
3. Quora
4. [Source](https://rosettacode.org/wiki/Luhn_test_of_credit_card_numbers)