The GCF is 1.
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The factors of 47 are:1, 47The factors of 75 are:1, 3, 5, 15, 25, 75The common factor is:1
Since both 23 and 47 are prime numbers, their greatest common factor is 1.
The GCF is 1.
The GCF is 1.
47 is a prime number so the great common factor of 47 and any other number can only ever be 1.