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

hacktick

1,447
•
1,419
🥇0
•
🥈0
•
🥉0

⛳

2 / 108 Holes

🔣

1 / 58 Langs

🏆

3 / 75 Cheevos

📅

Fibonacci
629
Leap Years
818