The GCD of given numbers is 1.
| factors of 11 are : | 1 , 11 |
| factors of 17 are : | 1 , 17 |
| factors of 8 are : | 1 , 2 , 4 , 8 |
| factors of 9 are : | 1 , 3 , 9 |
| factors of 10 are : | 1 , 2 , 5 , 10 |
| factors of 12 are : | 1 , 2 , 3 , 4 , 6 , 12 |
We see that the Greatest Common Factor = 1.