The ROT13 hole will go live in approximately . Why not try and solve it ahead of time?

stefangimmillaro (he/him)

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Card Number Validation in Java in Chars Play Hole

4th in Java and 189th overall.

Last tested .

Bytes Chars Submitted
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146 146
148 148
153 153
154 154
160 160
162 162
164 164
167 167
170 170
173 173