*This page was created using ideas from Doug Ray at www.academicmeet.com

A prime number is a number that is only divisible by 1 and itself. Numbers that are not prime are called composite numbers. The smallest prime number, which happens to be the only even prime number, is 2. The prime numbers from 2 to 100 are listed below and should all be memorized.

List of Prime Numbers

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

*Notice that there are only 25 primes between 0 and 100.

It is very important to learn prime numbers because many methods, like relatively prime, GCD, LCM, and others use prime numbers.