^.?$|^(..+?)\1+$
<answer>
Matches strings of any character repeated a non-prime number of times
Programmer Humor
!programmerhumor@lemmy.ml
Post funny things about programming here! (Or just rant about your favourite programming language.)
Rules:
- Posts must be relevant to programming, programmers, or computer science.
- No NSFW content.
- Jokes must be in good taste. No hate speech, bigotry, etc.
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