# What is the Greatest Common Factor of 72 and 76?

Greatest common factor (GCF) of 72 and 76 is **4**.

GCF(72,76) = 4

We will now calculate the prime factors of **72 and 76**, than find the greatest common factor *(greatest common divisor (gcd))* of the numbers by matching the biggest common factor of 72 and 76.

## How to find the GCF of 72 and 76?

We will first find the prime factorization of 72 and 76. After we will calculate the factors of 72 and 76 and find the biggest common factor number .

### Step-1: Prime Factorization of 72

Prime factors of 72 are 2, 3. Prime factorization of **72** in exponential form is:

72 = 2^{3} × 3^{2}

### Step-2: Prime Factorization of 76

Prime factors of 76 are 2, 19. Prime factorization of **76** in exponential form is:

76 = 2^{2} × 19^{1}

### Step-3: Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36

### Step-4: Factors of 76

List of positive integer factors of 76 that divides 72 without a remainder.

1, 2, 4, 19, 38

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72 and 76. The biggest common factor number is the **GCF** number.

So the **greatest common factor 72 and 76** is **4**.

Also check out the Least Common Multiple of 72 and 76