Express each number in terms of its prime factors.
77 = 7 x 11
259 = 7 x 37
The only common factor and therefore the highest common factor is 7.
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Greatest common factor of 77 and 121 is 11.
The GCF is 7.
The GCF of 77, 121 and 143 is 11.11
The Greatest Common Factor (GCF) is: 7
The GCF is 7.