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# What is the greatest prime factor of 4^17 - 2^28?

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Math Expert
Joined: 02 Sep 2009
Posts: 59587
Re: What is the greatest prime factor of 4^17 - 2^28?  [#permalink]

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15 Oct 2019, 05:08
student26 wrote:
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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Hope it helps.
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Re: What is the greatest prime factor of 4^17 - 2^28?   [#permalink] 15 Oct 2019, 05:08

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