# Prime Numbers Chart

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Print a copy of this prime number chart printable (PDF) which features a visual representation of the prime numbers from 1 to 100.

I originally created this prime numbers chart for my pre-calculus students to use as a reference while simplifying radicals. My students used this chart as a quick way to tell if a number was prime since they knew that if a radical had a prime radicand that it would never simplify.

It has a wide range of other uses in the middle school and high school math classroom. I also included this printable prime numbers chart along with a few other math charts for my students to use as a reference to create a foldable reference chart for my high school math students to reference. Also included are pythagorean triples, factors of 1-100, perfect squares, and perfect cubes.

If you are looking for other printable charts, I have a wide variety of free printable math charts for teachers to download and use with their students.

## What is a Prime Number Chart?

This prime number chart is a number grid (specifically a hundreds chart) which has each of the prime numbers under 100 highlighted in gray. The non-highlighted numbers (other than 1) are composite numbers. The number 1 is neither prime nor composite.

## List of Prime Numbers 1-100

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97

## Uses for Prime Number Charts

• Determining if a number is prime or composite
• Identifying Radicals which do not Simplify
• Finding the Prime Factorization of a Natural Number
• Finding Common Denominators – If One of the Denominators is Prime, you will need to multiply the two denominators to find a common denominator.

## Create Your Own Prime Number Chart

Do you want to have students create their own prime number chart? I offer several free printable number charts which could easily be color-coded to create prime and composite numbers charts.

You could also have students work through a Sieve of Eratosthenes activity to determine if given numbers are prime or composite.