4 ms·

I'm really curious now - which cards don't conform? I always thought it's basically an industry standard and no network issues cards that don't have a correct

I'm really curious now - which cards don't conform? I always thought it's basically an industry standard and no network issues cards that don't have a correct checksum.

ceejayoz 2y ago
https://stackoverflow.com/questions/7863058/does-the-luhn-algorithm-work-for-all-mainstream-credit-cards-discover-visa-m https://stackoverflow.com/questions/7863058/does-the-luhn-al... has a list.
- drdaeman 2y ago
  Wow, thank you. TIL!