There is no GCF of 32 and 81 because no prime numbers go into either 32 or 81
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The greatest common factor of 56 and 81 is 1.
The Greatest Common Factor of 81, 108, 117: 9
The GCF of 53 and 81 is 1.
The greatest common factor of 58 and 81 is 1.
The Greatest Common Factor (GCF) is: 3