What is the Greatest Common Factor of 345 and 358?

Greatest common factor (GCF) of 345 and 358 is 1.

GCF(345,358) = 1

We will now calculate the prime factors of 345 and 358, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 345 and 358.

How to find the GCF of 345 and 358?

We will first find the prime factorization of 345 and 358. After we will calculate the factors of 345 and 358 and find the biggest common factor number .

Step-1: Prime Factorization of 345

Prime factors of 345 are 3, 5, 23. Prime factorization of 345 in exponential form is:

345 = 3¹ × 5¹ × 23¹

Step-2: Prime Factorization of 358

Prime factors of 358 are 2, 179. Prime factorization of 358 in exponential form is:

358 = 2¹ × 179¹

Step-3: Factors of 345

List of positive integer factors of 345 that divides 345 without a remainder.

1, 3, 5, 15, 23, 69, 115

Step-4: Factors of 358

List of positive integer factors of 358 that divides 345 without a remainder.

1, 2, 179

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 345 and 358. The biggest common factor number is the GCF number.
So the greatest common factor 345 and 358 is 1.

Also check out the Least Common Multiple of 345 and 358