Prime Factorization and Prime or Composite Numbers

Use a factor tree to find the prime factorization of 32

• 2x2x2x4

• 2x2x2x2x2

• 4x4x2

• 2x2x2x2x1

Use a factor tree to find the prime factorization of 64

• 4x4x4

• 4x4x2x2

• 2x2x2x2x2x2

• 4x4x2x1

Use a factor tree to find the prime factorization of 72

• 2x2x2x3x3

• 4x3x3x2

• 4x2x2x2x2

Find the prime factorization of 18

• 2 • 9

• 2² • 3

• 2 • 3²

• 3 • 6

2 x 2 x 2 is the prime factorization of

• 6

• 12

• 22

• 8

Is 5 prime or composite? 

• Prime

• Composite

Use a factor tree to find the prime factorization of 60

• 5x3x2x2

• 7x6x5

• 5x3x3x2

• 7x5x4

Use a factor tree to find the prime factorization of 42

• 4x4x3

• 6x7

• 7x3x2

• 5x4x2