the greatest prime factor

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the greatest prime factor

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


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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