Whatnis the greatest common factor of 7 and 19

7 and 19 are both prime numbers.

Factors of 7

1 * 7 = 7

7 * 1 = 7

factors are 1 and 7

Factors of 19

1 * 19 = 19

19 * 1 = 19

factors are 1 and 19

GCF = greater common factor

So GCF is 1 because there is no greater common number in the 7 and 19