Hi, this is the fastest possible prime checker. There is a few downsides to this one: It can’t tell you what your number is divisible by (if it’s not prime). If you want it to be EVEN FASTER, use https://turbowarp.org/467562647. If you want it faster than that, You need to change my code: first, get rid of the pink backdrop, and the sprite’s costumes. Make the sprite say things instead. If you want to know the factors, use the “best quality“ prime checker at https://scratch.mit.edu/projects/467273555/editor/. For now, enjoy!