The GCF is 17.
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Factors of 3: 1, 3 Factors of 68: 1, 2, 4, 17, 34, 68 GCF (3, 68) = 1
17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187.
51: 51, 102, 153, 204, 255 68: 68, 136, 204, 272, 340 The least common multiple of 51 and 68 is 204.
34, 68, 102, 136, 170, 204, 238, 272, 306, 340, . . .
The factors of 102 are:1, 2, 3, 6, 17, 34, 51, 102The factors of 136 are:1, 2, 4, 8, 17, 34, 68, 136The common factors are:1, 2, 17, 34The Greatest Common Factor:GCF = 34