the greatest prime factor

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sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Wed Apr 08, 2009 3:54 am

What is the greatest prime factor of 4 ^17 - 2 ^ 28?
A. 2
B. 3
C. 5
D. 7
E. 11

OA D

The mind is everything. What you think you become. -Lord Buddha

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Source: Beat The GMAT — Problem Solving | Wed Apr 08, 2009 3:54 am

kaf: Senior | Next Rank: 100 Posts; Posts: 53; Joined: Mon Feb 09, 2009 12:18 am; Thanked: 1 times

by kaf » Wed Apr 08, 2009 4:15 am

This question has been answered and explained thoroughly here

https://www.beatthegmat.com/greatest-pri ... 14712.html

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