CIRCLE WITH A DOT

@simontatham i don't think I knew the part about Carmichael number.

@simontatham wasn't there some quote about it being some Ramanujan number or smth? I remember the first part from somewhere. Maybe not the same number but could be. (Ah yeah wikipedia says it is. Must be true then. )

@claesdevreese just enough dropped for the cozy winter atmosphere. 🥶️

@lina indeed first 3 pages on DDG are relevant. (Github, homepage, yt) That's how a search engine should be performing.