What is the Greatest Common Factor of 203 and 217?

Greatest common factor (GCF) of 203 and 217 is 7.

GCF(203,217) = 7

We will now calculate the prime factors of 203 and 217, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 203 and 217.

How to find the GCF of 203 and 217?

We will first find the prime factorization of 203 and 217. After we will calculate the factors of 203 and 217 and find the biggest common factor number .

Step-1: Prime Factorization of 203

Prime factors of 203 are 7, 29. Prime factorization of 203 in exponential form is:

203 = 7¹ × 29¹

Step-2: Prime Factorization of 217

Prime factors of 217 are 7, 31. Prime factorization of 217 in exponential form is:

217 = 7¹ × 31¹

Step-3: Factors of 203

List of positive integer factors of 203 that divides 203 without a remainder.

1, 7, 29

Step-4: Factors of 217

List of positive integer factors of 217 that divides 203 without a remainder.

1, 7, 31

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 203 and 217. The biggest common factor number is the GCF number.
So the greatest common factor 203 and 217 is 7.

Also check out the Least Common Multiple of 203 and 217