What is the greatest common factor of
4^17 - 2^28
2
3
5
7
11
OA: D
I broke this down into 2^34 - 2^28
What's next step?
4^17 - 2^28
2
3
5
7
11
OA: D
I broke this down into 2^34 - 2^28
What's next step?
You're on the right track.
2^34-2^28
2^28(2^6-1)
2^28(63)
63 is divisible by the prime factor 7. Therefore, 7 is our answer.
