Prime Numbers Chart

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. 

• 1-100 Number Chart
• 1-150 Number Chart
• 1-200 Number Chart 

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

More Resources for Teaching Prime Numbers 

• Prime Factorization Foldable
• Prime Factorization Graphic Organizer
• Prime Climb Game Review (An Excellent Game by Dan Finkel)  
• Prime Numbers Poster 
• Prime and Composite Number Chart for Color-Coding