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Prime Factor

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by analyst218 » Thu Apr 15, 2010 2:07 pm
slortta wrote:What is the greatest prime factor of 2^100 - 2^96?
5
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by slortta » Thu Apr 15, 2010 3:05 pm
the explanation is still missing
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by akahuja143 » Thu Apr 15, 2010 3:34 pm
5

here is how 2^100 -2^96 = 2^96(2^4 -1) = 2^96 (16-1) = 2 ^96(15) = 2^96 *5 *3 = greatest prime factor is 5

Hope it helps!!
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by slortta » Fri Apr 16, 2010 12:12 am
thanks a lot.. i got it now
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