Here is a fun problem, it's hard to write out clearly, but I'll try to do it w/ little confusion.(adsbygoogle = window.adsbygoogle || []).push({});

Is it, or is it not true that

(2^2^....^2)(n times)=(2^2^...^2)(n-1 times) mod n

so for example, when [tex]n=2[/tex], [tex]2^2=2[/tex] ->

[tex]4=2[/tex] mod 2.

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# Congruence classes

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