What is the Greatest Common Factor of 42978 and 42998?

Greatest common factor (GCF) of 42978 and 42998 is 2.

GCF(42978,42998) = 2

We will now calculate the prime factors of 42978 and 42998, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42978 and 42998.

How to find the GCF of 42978 and 42998?

We will first find the prime factorization of 42978 and 42998. After we will calculate the factors of 42978 and 42998 and find the biggest common factor number .

Step-1: Prime Factorization of 42978

Prime factors of 42978 are 2, 3, 13, 19, 29. Prime factorization of 42978 in exponential form is:

42978 = 2¹ × 3¹ × 13¹ × 19¹ × 29¹

Step-2: Prime Factorization of 42998

Prime factors of 42998 are 2, 21499. Prime factorization of 42998 in exponential form is:

42998 = 2¹ × 21499¹

Step-3: Factors of 42978

List of positive integer factors of 42978 that divides 42978 without a remainder.

1, 2, 3, 6, 13, 19, 26, 29, 38, 39, 57, 58, 78, 87, 114, 174, 247, 377, 494, 551, 741, 754, 1102, 1131, 1482, 1653, 2262, 3306, 7163, 14326, 21489

Step-4: Factors of 42998

List of positive integer factors of 42998 that divides 42978 without a remainder.

1, 2, 21499

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42978 and 42998. The biggest common factor number is the GCF number.
So the greatest common factor 42978 and 42998 is 2.

Also check out the Least Common Multiple of 42978 and 42998