What is the Greatest Common Factor of 421 and 427?

Greatest common factor (GCF) of 421 and 427 is 1.

GCF(421,427) = 1

We will now calculate the prime factors of 421 and 427, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 421 and 427.

How to find the GCF of 421 and 427?

We will first find the prime factorization of 421 and 427. After we will calculate the factors of 421 and 427 and find the biggest common factor number .

Step-1: Prime Factorization of 421

Prime factors of 421 are 421. Prime factorization of 421 in exponential form is:

421 = 421¹

Step-2: Prime Factorization of 427

Prime factors of 427 are 7, 61. Prime factorization of 427 in exponential form is:

427 = 7¹ × 61¹

Step-3: Factors of 421

List of positive integer factors of 421 that divides 421 without a remainder.

Step-4: Factors of 427

List of positive integer factors of 427 that divides 421 without a remainder.

1, 7, 61

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 421 and 427. The biggest common factor number is the GCF number.
So the greatest common factor 421 and 427 is 1.

Also check out the Least Common Multiple of 421 and 427