No cookie for me I just tried it in Notepad++ and VS code and it matches lines of one characer (first group I think) or the starting of a line that is an at least 2 characters string repeated twice (second group it seems)
so the second group matches abab
abcabc abcdeabce abcdefabcdef

Nothing about prime numbers really only first repetition gets a match. Very interesting Honestly I used regex from years and never had to retort to something like this ever. I can only imagine it useful to check for a password complexity to not be repeated strings like I do for sites that I just want in and use a yopmail.com mail to register a fake user.

The problem is that you are totally unknown to us if you happen to not update or something what would we do? Who do we call? What we will say? You’ll need to set up a network of people that checks on you and can ring an alarm.

Isn’t the same happening with Jeff Tiedrich?