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A prime number is a special number that can only be divided by one and itself.

It makes them a pain for this fella who likes to divide things into neat, equal piles.

Let’s dig further…

Take the number three.

Three is a prime number, it’s only factors are three and one, so it can only be divided into one group of three, or three group of one.

There is no other combination.

Now four is not a prime number, as well as groups of four and one, we can also divide four into two groups of two.

Oh, here we go again, this isn’t going to end well.

Five is a prime again, it only has two factors, one and five.

You can keep going higher and higher, finding bigger and bigger prime numbers like seven, eleven, thirteen and even 997!

But don’t forget, number one doesn’t count because it only has one factor.

Sorry!