# How do you find the greatest common factor of 12 and 60?

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Oct 11, 2017

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The greatest common factor of

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What is the greatest common factor (GCF)?

That is the largest number that will divide into all those given.

To find it, the **smallest prime** numbers should be divided into each one. Prime numbers are: 2, 3, **5**, 7, 11, 13, 17, 19.

Notice that

So, if we divide

Then,

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