Is 31 a Composite Number?

Nope. Thirty one isn't a composite. I blame myself. And its factors. Way easier than factoring, am I right? Have fun storming the castle.

Maybe you'd like to know what is the absolute value of -31?
Or try another number:

Random atomic facts:germanium arsenic selenium bromine krypton rubidium strontium yttrium zirconium niobium