# What is the Greatest Common Factor of 140 and 159?

Greatest common factor (GCF) of 140 and 159 is 1.

GCF(140,159) = 1

We will now calculate the prime factors of 140 and 159, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 140 and 159.

GCF Calculator and
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## How to find the GCF of 140 and 159?

We will first find the prime factorization of 140 and 159. After we will calculate the factors of 140 and 159 and find the biggest common factor number .

### Step-1: Prime Factorization of 140

Prime factors of 140 are 2, 5, 7. Prime factorization of 140 in exponential form is:

140 = 22 × 51 × 71

### Step-2: Prime Factorization of 159

Prime factors of 159 are 3, 53. Prime factorization of 159 in exponential form is:

159 = 31 × 531

### Step-3: Factors of 140

List of positive integer factors of 140 that divides 140 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70

### Step-4: Factors of 159

List of positive integer factors of 159 that divides 140 without a remainder.

1, 3, 53

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 140 and 159. The biggest common factor number is the GCF number.
So the greatest common factor 140 and 159 is 1.

Also check out the Least Common Multiple of 140 and 159