Greatest Common Factor of 10 and 15 by Prime Factorization

Given Numbers: 10, 15
Identify the Prime Factors of 10 and 15 by Prime Factorization

• Prime Factorization of 10: 10 = 2 x 5 = 2¹ x 5¹
• Prime Factorization of 15: 15 = 3 x 5 = 3¹ x 5¹

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

• 5 is the only Prime Factor common to the Prime Factorizations of 10 and 15

Determine the least number of occurrences of 5 among the Prime Factorizations:

• 5 occurs 1 time in each Prime Factorization

As a result, the Greatest Common Factor (GCF) of 10 and 15 is equal to 5, which equals 5 raised to the power of its least number of occurrences or smallest exponent among the Prime Factorizations:

• GCF (10, 15) = 5¹
• GCF(10, 15) = 5

Therefore, the Greatest Common Factor of 10 and 15 by Prime Factorization = 5