You need at least two numbers to find a GCF. If that's 72 and 96, the GCF is 24.
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The Greatest Common Factor (GCF) is: 8
The greatest common factor is 2
The greatest common factor of 30 and 39 is 3.
The greatest common factor (GCF) is: 5.
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.