On my question Implement hyperexponentiation/tetration without the use of '^' asked a few months ago I accepted an answer with 18 characters, which, at the time of selection, was the shortest submission.
Now, there is a solution in J that was 19 characters at the time, but is now 12.
I normally wait 1-2 weeks before accepting an answer, but what if a submission is given after that period? Should I check on my questions regularly and update them, or do I just leave the accepted answer? What is the protocol here?