1. Prime Factorization:
Objective: To identify prime and composite numbers.
To write the prime factorization of numbers
Vocabulary
Prime Number: A number greater than 1 that has only two factors (1 and the number itself)
Examples:
5: because 5 and 1 are its only factors
17: because 17 and 1 are its only factors
Composite Number: A whole number greater than one that has more than two factors.
6: because it has four factors 1, 2, 3, 6
Examples:
9: because it has three factors 1, 3, 9

2. 0 and 1 are neither prime or composite
A number written as a product of factors that are all prime numbers.
Prime Factorization:
A useful tool used to find prime factorization.
Factor Tree:
Example: Make a factor tree for the number 40 40 40 40 2 20 5 8 5 8 4 5 4 2 4 2 2 2 2 2 5 5 2 2 2 5 2 2
All three factor trees have three 2’s and a 5
The prime factorization of 40 is

3. 50 2 25 2 5 5
2•52
120 12 10 5 4 3 2 2 2 3 5 2
23•3•5