The word "GREATEST" is a superlative adjective and that means there can be only one. Furthermore, the greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
There is not a greatest common factor of 479 because there cannot be a greatest common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The factors of 479 are 1 and 479. Since 479 is a prime number, it does not have any other factors than 1 and itself. The only common factors it could have with another number are 1 or 479.
A single number cannot have a greatest common factor because "common" refers to factors that two or more numbers have in common. You have only one number.
The two numbers can be 479 and 958 (479 doubled). 958 only has the factors 479 and 2, so, since 2 does not factor into 479, the common factor remains 479.
A single number cannot have a greatest common factor because "common" refers to factors that two or more numbers have in common. You have only one, which is 479. Also, only one number can be the greatest.
479 is a prime number. Numbers having a greatest common factor of 479 are 479 and 958, or any other two or more multiples of 479.
There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
The greatest of the common factors of two or more numbers is the GCF
One solution would be to list the factors of the two numbers and find all the common factors. The greatest one would be the greatest common factor.
958 and 1437
The two common factors are: 1, 7
The greatest common factor is two.
The greatest common factor is two.