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

StefanTifrea

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11 / 108 Holes

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2 / 58 Langs

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7 / 75 Cheevos

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Abundant Numbers
696
Divisors
766
Evil Numbers
607
Fibonacci
846
Fizz Buzz
533
Leap Years
911 652
Niven Numbers
592
Odious Numbers
607
Ordinal Numbers
496
Pernicious Numbers
343
Prime Numbers
554