What is the Greatest Common Factor of 287 and 305?

Greatest common factor (GCF) of 287 and 305 is 1.

GCF(287,305) = 1

We will now calculate the prime factors of 287 and 305, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 287 and 305.

How to find the GCF of 287 and 305?

We will first find the prime factorization of 287 and 305. After we will calculate the factors of 287 and 305 and find the biggest common factor number .

Step-1: Prime Factorization of 287

Prime factors of 287 are 7, 41. Prime factorization of 287 in exponential form is:

287 = 7¹ × 41¹

Step-2: Prime Factorization of 305

Prime factors of 305 are 5, 61. Prime factorization of 305 in exponential form is:

305 = 5¹ × 61¹

Step-3: Factors of 287

List of positive integer factors of 287 that divides 287 without a remainder.

1, 7, 41

Step-4: Factors of 305

List of positive integer factors of 305 that divides 287 without a remainder.

1, 5, 61

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 287 and 305. The biggest common factor number is the GCF number.
So the greatest common factor 287 and 305 is 1.

Also check out the Least Common Multiple of 287 and 305