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This is tricky.

Once you determine that 73 is a Prime number then you can ignore 127 (since 73 is not a factor of 127).

So, the greatest common factor is 1.

Note: if you asked 73 and 146 then the answer would be 73.

Anytime one of the numbers is a prime - then the answer is EITHER 1 or the prime number (if the other number is a multiple of the prime).

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14y ago
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7y ago

The GCF is 1.

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Q: What is the greatest common factor of 73 and 127?
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