What is greatest common factor of 1?

Answer 1

A factor of a number is any number which the original number can divide evenly into (that is, it can divide without leaving a remainder or fraction). Therefore, the factors of 3 are 1 and 3. The factors of 5 are 1 and 5. A common factor is a factor which is present in both lists. In this case, the only common factor of 3 and 5 is 1. Thus the greatest common factor of 3 and 5 is 1.

Answer 2

There is no Greatest Common Factor (GCF) for a single number. The Greatest Common Factor (GCF) is the largest factor common to two or more given numbers.

Answer 3

The GCF of any set of numbers containing two (or more) coprimes is 1. So YES, 1 can be a GCF.

Answer 4

one cannot be a gcf because it is prime

Answer 5

Yes.