# What is the Greatest Common Factor of 4 and 5?

Greatest common factor (GCF) of 4 and 5 is 1.

GCF(4,5) = 1

We will now calculate the prime factors of 4 and 5, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 4 and 5.

GCF Calculator and
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## How to find the GCF of 4 and 5?

We will first find the prime factorization of 4 and 5. After we will calculate the factors of 4 and 5 and find the biggest common factor number .

### Step-1: Prime Factorization of 4

Prime factors of 4 are 2. Prime factorization of 4 in exponential form is:

4 = 22

### Step-2: Prime Factorization of 5

Prime factors of 5 are 5. Prime factorization of 5 in exponential form is:

5 = 51

### Step-3: Factors of 4

List of positive integer factors of 4 that divides 4 without a remainder.

1, 2

### Step-4: Factors of 5

List of positive integer factors of 5 that divides 4 without a remainder.

1

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 4 and 5. The biggest common factor number is the GCF number.
So the greatest common factor 4 and 5 is 1.

Also check out the Least Common Multiple of 4 and 5