Question 1168701
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a, b, c, d, and e are the five known prime Fermat numbers (in descending order)


65537, 257, 17, 5, and 3.


A Fermat number is of the form *[tex \Large F_n\ =\ 2^2^n\,+\,1].


e, d, c, b, a are *[tex \Large F_n] for *[tex \Large n\ \in\ \{0,1,2,3,4\}]


*[tex \Large F_n] for *[tex \Large n\ \geq\ 5] believed to be composite.

																
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
*[illustration darwinfish]


I > Ø
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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