What is the Greatest Common Factor of 385 and 397?

Greatest common factor (GCF) of 385 and 397 is 1.

GCF(385,397) = 1

We will now calculate the prime factors of 385 and 397, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 385 and 397.

How to find the GCF of 385 and 397?

We will first find the prime factorization of 385 and 397. After we will calculate the factors of 385 and 397 and find the biggest common factor number .

Step-1: Prime Factorization of 385

Prime factors of 385 are 5, 7, 11. Prime factorization of 385 in exponential form is:

385 = 5¹ × 7¹ × 11¹

Step-2: Prime Factorization of 397

Prime factors of 397 are 397. Prime factorization of 397 in exponential form is:

397 = 397¹

Step-3: Factors of 385

List of positive integer factors of 385 that divides 385 without a remainder.

1, 5, 7, 11, 35, 55, 77

Step-4: Factors of 397

List of positive integer factors of 397 that divides 385 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 385 and 397. The biggest common factor number is the GCF number.
So the greatest common factor 385 and 397 is 1.

Also check out the Least Common Multiple of 385 and 397