I created this free printable prime numbers chart that features all of the prime numbers under 100 for my Pre-Calculus students to reference while simplifying radicals recently. I think it would be useful for a much wider range of math students, though. My students were looking for a quick way to tell if a number was prime since they knew that prime radicands would never simplify.

I actually ended up combining this prime numbers under 100 chart with several other charts and creating a reference chart booklet for my students, but I will have to share that a different day!

## Free Download of Prime Numbers Chart

Prime Numbers Under 100 Chart (PDF) (527 downloads)

Prime Numbers Under 100 Chart (Editable Publisher File ZIP) (146 downloads)

## More Activities for Teaching Prime Factorization

- Free Printable Factors Chart 1-100
- Prime Numbers Chart
- Factors Race Activity
- Prime Factorization Foldable
- Prime Factorization Graphic Organizer
- Factor Tree Puzzles Inspired by Dr. Harold Reiter
- Prime Numbers Below 100 Chart
- Prime Factorization Practice Booklet
- Prime Factorization using the Birthday Cake Method

## More Free Math Reference Charts

- Free Printable Greek Alphabet
- Free Printable Factors Chart 1-100
- Foldable Math Reference Chart
- Prime Numbers Chart
- Exponents Chart (Powers of 2 to 9)
- Powers of 2 Chart
- Trig Identities Cheat Sheet [Free Printable]
- Prime Factorization Foldable
- Prime Numbers Below 100 Chart
- Grouping Symbols Reference Chart & Poster
- Mathematician’s Toolbox Foldable for INBs