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Old 2018-01-15, 15:03   #8
Nick
 
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Dec 2012
The Netherlands

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Quote:
Originally Posted by lukerichards View Post
I think this is sufficient?...
Yes, that's fine.
You can also visualize it by writing the numbers in binary.
For example, \(2^4-1\) is a factor of \(2^{12}-1\) as
\[ \underbrace{1111}\underbrace{1111}\underbrace{1111}=1111\times 100010001 \]
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