@golgaloth YUP.

Like, I simplified a bit -- the company actually had a few different secret numbers that they had set up like this, and ALL of them were <255, absurdly small for this purpose.

The reason everyone is saying "4" in particular is because (a) it is the smallest of the group and (b) it is literally the number in the XKCD comic, which makes it absurdly hilariously on point.