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121 = 11*11 & 143 = 11*13 = GCF = 11

***** Another Breakdown *****

The factors of 121 are: 1 11 121

The prime factors are: 11 x 11

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The factors of 143 are: 1 11 13 143

The prime factors are: 11 x 13

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Q: What is the greatest common factor of 121 and 143?
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