What is the Greatest Common Factor of 12 and 8?
Greatest common factor (GCF) of 12 and 8 is 4.
GCF(12,8) = 4
We will now calculate the prime factors of 12 and 8, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12 and 8.
How to find the GCF of 12 and 8?
We will first find the prime factorization of 12 and 8. After we will calculate the factors of 12 and 8 and find the biggest common factor number .
Step-1: Prime Factorization of 12
Prime factors of 12 are 2, 3. Prime factorization of 12 in exponential form is:
12 = 22 × 31
Step-2: Prime Factorization of 8
Prime factors of 8 are 2. Prime factorization of 8 in exponential form is:
8 = 23
Step-3: Factors of 12
List of positive integer factors of 12 that divides 12 without a remainder.
1, 2, 3, 4, 6
Step-4: Factors of 8
List of positive integer factors of 8 that divides 12 without a remainder.
1, 2, 4
Final Step: Biggest Common Factor Number
We found the factors and prime factorization of 12 and 8. The biggest common factor number is the GCF number.
So the greatest common factor 12 and 8 is 4.
Also check out the Least Common Multiple of 12 and 8