Why Do We Use Prime Numbers?

Prime numbers are like special bricks that can’t be broken into smaller bricks. You can only make them by multiplying 1 and themselves, no other way! That makes them really useful for building everything else in math.

Take the quiz →

Examples

A pizza with 7 slices, that’s a prime number because you can’t split it evenly among more than 1 or 7 people.
The number 2 is like the first special brick in math since you only need to multiply 1 and itself to make it.
4 isn’t prime, it can be divided into 2 and 2, so it’s not as special as 3 or 5.

Ask a question

Discussion

Recent activity

Categories: Math · prime numbers· math basics· number theory