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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. |

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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