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

stefangimmillaro (he/him)

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108 / 108 Holes

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23 / 58 Langs

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52 / 75 Cheevos

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Divisors in PHP in Chars Play Hole

31st in PHP and 2,115th overall.

Last tested .

Bytes Chars Submitted
59 59
65 65
66 66