# What is the Greatest Common Factor of 50 and 66?

Greatest common factor (GCF) of 50 and 66 is **2**.

GCF(50,66) = 2

We will now calculate the prime factors of **50 and 66**, than find the greatest common factor *(greatest common divisor (gcd))* of the numbers by matching the biggest common factor of 50 and 66.

## How to find the GCF of 50 and 66?

We will first find the prime factorization of 50 and 66. After we will calculate the factors of 50 and 66 and find the biggest common factor number .

### Step-1: Prime Factorization of 50

Prime factors of 50 are 2, 5. Prime factorization of **50** in exponential form is:

50 = 2^{1} × 5^{2}

### Step-2: Prime Factorization of 66

Prime factors of 66 are 2, 3, 11. Prime factorization of **66** in exponential form is:

66 = 2^{1} × 3^{1} × 11^{1}

### Step-3: Factors of 50

List of positive integer factors of 50 that divides 50 without a remainder.

1, 2, 5, 10, 25

### Step-4: Factors of 66

List of positive integer factors of 66 that divides 50 without a remainder.

1, 2, 3, 6, 11, 22, 33

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 50 and 66. The biggest common factor number is the **GCF** number.

So the **greatest common factor 50 and 66** is **2**.

Also check out the Least Common Multiple of 50 and 66