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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Leap Years in JavaScript in Bytes Play Hole

134th in JavaScript and 665th overall.

Last tested .

Bytes Chars Submitted
45 45