University of St. Andrews (UK)
University of St. Andrews: Prime Numbers
Learn the history and mathematicians behind the study of prime numbers.
Cool Math
Coolmath: Coolmath4kids: Math Ficher Prime Numbers
Hop into your boat and go fishing for the prime numbers between 1 and 100!
![Wired Math: Primes and Prime Factors [Pdf] Unknown Type](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Wired Math: Primes and Prime Factors [Pdf] Unknown Type")
University of Waterloo (Canada)
Wired Math: Primes and Prime Factors [Pdf]
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.
Scholastic
Scholastic: Study Jams! Math: Multiplication & Division: Prime Numbers
This site provides great practice on the concept of prime and composite numbers. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice...
Math Planet
Math Planet: Factorization and Prime Numbers
Gain an understanding of how to factor prime numbers by viewing examples and a video lesson.
Calculator Soup
Calculator Soup: 1000 Prime Numbers
The prime numbers table lists the first 1000 prime numbers from 2 to 8011. There are 1,009 total prime numbers in the lookup table.
Homeschool Math
Homeschool Math: Prime Factorization
This site contains a free lesson on Prime Factorization in which students learn by doing practice problems.
AAA Math
Aaa Math: Prime and Composite Numbers
This math tutorial offers an explanation of prime and composite numbers and lets students practice finding them.
Wolfram Research
Wolfram Math World: Prime Number
Prime Numbers are defined with a glossary hyperlink to terms used in the definition. Lots of information and examples included. Lists many math-related links. Scroll down to the bottom of the page to see how prime numbers are used in the...
CK-12 Foundation
Ck 12: Elem Math: Prime Factorization
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems about prime factorization.
National Council of Teachers of Mathematics
The Math Forum: How Do You Find Prime Numbers?
This site explains prime number theory and how to find prime numbers.
Alabama Learning Exchange
Alex: Exploring Prime Numbers
Exploring Prime Numbers is a hands-on, minds-on math lesson that engages students in the discovery of prime numbers through the construction of multiplication arrays. Students then extend on their background knowledge of multiples and...
Khan Academy
Khan Academy: Prime and Composite Numbers Intro
Discusses factors, prime and composite numbers, and why the number 1 is not prime or composite. Includes practice problems throughout, along with explanations of solutions.
McGraw Hill
Glencoe: Self Check Quizzes 1 Prime Factors
Use Glencoe's randomly generated self-checking quiz to test your knowledge of prime factors. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It" button and...
E-learning for Kids
E Learning for Kids: Math: Inca Temple: Number Sense
Do you want to know how to pronounce really big numbers? Paul can teach you!
Math Open Reference
Math Open Reference: Prime Number
Learn about prime numbers with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.
Mangahigh
Mangahigh: Sigma Prime: Prime Factorization With Multiplication and Division
Practice your multiplication and division skills with prime numbers and prime factorization as you battle alien invaders.
Mathigon
Mathigon: Math Foundations: Divisibility and Primes: Real Life Applications
This lesson provides real life applications for divisibility and prime numbers including the Cicada Cycle's use of prime numbers and Cryptography,encryption.
Wolfram Research
Wolfram Math World: Relatively Prime
This explanation of relatively prime numbers includes many links to related definitions. The site includes some interesting facts about relatively prime numbers, including probability with respect to integers and relatively prime...
Wyzant
Wyzant: Prime Number List
WyzAnt provides a list of the prime numbers. The user decides how many primes to see and in what fashion--horizontally or vertically and in how many rows.
University of Cambridge
University of Cambridge: Nrich: Two Primes Make One Square
On this one page website sharpen your logic, prime numbers and square numbers skills while working on this challenge. The solution is available to double check your solution.
McGraw Hill
Glencoe: Self Check Quizzes 2 Prime Factorization
Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of prime factorization. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...
Khan Academy
Khan Academy: Identify Composite Numbers
Identify composite numbers less than 100. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Amby Duncan-Carr
Prime Factorization: Amby's Resources
What is prime factorization? This site goes through a step-by step process explaining different ways to find the prime factorization.