Explains what Prime Numbers are and how to find them. Includes a list of primes under 200 and discusses the Sieve of Eratosthenes. This site has numerous links to other internet sources regarding prime numbers.

A discussion of Eratosthenes' development of the system of prime numbers. Includes a Java program that demonstrates the sieve.

Named after the Greek Mathematician. This classic method of finding prime numbers is also great for teaching about factors and multiples. The visnos sieve allows for multi colored squares this allows identification of any numbers prime...

Gives details of the accomplishments of Eratosthenes in the field of mathematics.

This lesson focuses on prime numbers, numbers that can only be divided by one and itself. It explains the Fundamental Theorem of Arithmetic and the Sieve of Eratosthenes. Includes practice activities.

Discover all the primes up to the number 400 by using this interactive table. Simply click on a number and its multiples disappear.

This interactive unit explain what prime numbers are and how to find them. It also discuss the Sieve of Eratosthenes and the Mersenne number.

Learn about the history of prime numbers, properties of prime numbers, and easy methods to find prime numbers. Included are solved examples and interactive problems for review.

Reinforce your knowledge about prime and composite numbers. Geogebra plugin required.

Exploring Prime Numbers is a hands-on, minds-on math lesson that engages learners in the discovery of prime numbers through the construction of multiplication arrays. Students then extend on their background knowledge of multiples and...