The GCD of given numbers is 1.
Step 1 : Place the numbers inside division bar:.
| 2 | 8 | 3 | 5 | 7 | 11 | 13 | 2 | 8 | 3 | 11 | 13 | 7 | 17 |
Step 2 : Number 2, 8, 3, 5, 7, 11, 13, 2, 8, 3, 11, 13, 7 and 17, cannot be both divided by any integer number, so the GCD is:
$$ GCD = 1 $$