1. Objective: Find the prime factorization of a composite number.

2. A Prime Number: is a whole number greater than 1 that has exactly 2 factors, 1 and itself. Examples: 2 = 1 × = 1 × = 1 × and 7, 11, 13 …
A Composite Number is a whole number greater than 1 that has more than two factors.
Examples: 4 = 1,2,4
6= 1,2,3,6
and 8, 9, 10 …

3. Determine whether the number is prime or composite.17 12 15 24 23

4. Prime Factorization: Every composite number can be written as a product of prime numbers. This product is the prime factorization. You can use a factor tree to find the prime factorization.
Examples: Method 1 60
Method 2 1

5. Examples: Find the prime factorization.

6. Homework:
Determine whether each number is prime or composite. 22 44 13 39 81 31
Find the prime factorization of each number. 96 42 99 64