Greatest Common Factor of 12 and 24 by Prime Factorization

Given Numbers: 12, 24
Identify the Prime Factors of 12 and 24 by Prime Factorization

• Prime Factorization of 12: 12 = 2 x 2 x 3 = 2² x 3¹
• Prime Factorization of 24: 24 = 2 x 2 x 2 x 3 = 2³ x 3¹

Determine the Prime Factor(s) that are common to the Prime Factorization of each number:

• 2 and 3 are Prime Factors common to the Prime Factorizations of 12 and 24

Determine the least number of occurrences of 2 and 3 among the Prime Factorizations:

• 2 occurs at least 2 times in each Prime Factorization
• 3 occurs 1 time in each Prime Factorization

As a result, the Greatest Common Factor (GCF) of 12 and 24 is equal to 2 x 2 x 3, which equals the product of 2 and 3 raised to the powers of their least number of occurrences or smallest exponent among the Prime Factorizations:

• GCF(12, 24) = 2² x 3¹ = 2 x 2 x 3
• GCF(12, 24) = 4 x 3
• GCF(12, 24) = 12

Therefore, the Greatest Common Factor of 12 and 24 by Prime Factorization = 12