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Prime and Composite Numbers < you are here
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Prime vs. Composite Numbers
| Factors: Factors are numbers that are multiplied to get a product. In the multiplication sentence 3X7=21, the factors of 21 are 3 and 7. |
| Prime numbers: Numbers that have only 2 factors, 1 and itself, are called prime numbers. Example: the number 5 is a prime number. You can not divide 5 evenly by 2, 3, or 4. You can only divide 5 evenly by 1 or itself. |
Prime and Composite Numbers
| Composite numbers: Numbers that have more than 2 factors are called composite numbers. The number 6 is an example of a composite number. You can divide six evenly by 1, 2, 3, and 6 |
Note: 1 is neither a prime number or a composite number.
The chart below shows some examples of prime and composite
numbers. The prime numbers are blue. The composite numbers are
black.
numbers. The prime numbers are blue. The composite numbers are
black.
Any whole number except 1 is either Prime or Composite.
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