4^17 = (2^2)^17 = 2^34.
This means that 2^34 - 2^28 = 2^28 (2^6 - 1) = 2^28 * 63 = 2^28 * 3^2 * 7.
Greatest prime factor is 7.
Greatest Prime Factor
This topic has expert replies
Source: Beat The GMAT — Problem Solving |
-
Bidisha800
- Master | Next Rank: 500 Posts
- Posts: 344
- Joined: Sun Sep 28, 2008 11:00 am
- Location: USA
- Thanked: 6 times
- Followed by:1 members
2^34-2^28
=2^28*(2^6-1)
=2^28*63
=2^28*3^3*7
Answer =7
(D)
=2^28*(2^6-1)
=2^28*63
=2^28*3^3*7
Answer =7
(D)
Drill baby drill !
GMATPowerPrep Test1= 740
GMATPowerPrep Test2= 760
Kaplan Diagnostic Test= 700
Kaplan Test1=600
Kalplan Test2=670
Kalplan Test3=570
GMATPowerPrep Test1= 740
GMATPowerPrep Test2= 760
Kaplan Diagnostic Test= 700
Kaplan Test1=600
Kalplan Test2=670
Kalplan Test3=570
