The Card Number Validation hole will go live in . Why not try and solve it ahead of time?

martinschneider

1,458
•
1,446
🥇0
•
🥈0
•
🥉0

⛳

2 / 108 Holes

🔣

1 / 58 Langs

🏆

6 / 75 Cheevos

📅

Fibonacci
699
Fizz Buzz
747