Show that 2k+1 cannot be a prime unless k is a power of 2. [Hint: Find a (polynomial) factor of Xp+1 for every odd prime p.]
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Setting we find that is prime... but 6 is not a power of 2 !... Kind regards
Originally Posted by NikoBellic Show that 2k+1 cannot be a prime unless k is a power of 2. [Hint: Find a (polynomial) factor of Xp+1 for every odd prime p.] I suspect you mean .
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Originally Posted by HallsofIvy I suspect you mean . Yeah, the formatting got lost for some reason.
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