The GCF is 17.
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The GCF is 17.
Greatest common factor of 51 and 34 is 17.
The GCF is 3.
The GCF of 21 and 51 is 3. Both these numbers have only one prime factorization. 21=3*7 51=3*17 So the greatest common divisor is 3.
the gcf is 17.