Title text:
Other numbers are largely unaffected, but anyone using '4' for their certificate key is urged to upgrade to '5'.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3314/
Det ved jeg godt :)
But it's fun to show that meme off. Danish numbers are wild. My bad danish gets me mistaken numbers all the time