XKCD | Website 2026-10-21

::: spoiler Alt Text Other numbers are largely unaffected, but anyone using ‘4’ for their certificate key is urged to upgrade to 5. :::

::: spoiler Transcript 1 Panel Comic

Cueball sits at a desk with his hands folded to report on an unfolding story.

Cueball: Breaking: Mathematicians have announced a critical vulnerability in the number line affecting the integer between 2 and 4. Until the patch is applied, if you must count small numbers of objects, please use the alternatives “half six” or “baker’s two.” :::