# Are there only finite Fermat Primes?

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 Subject: Number Theory » Analytic Number Theory
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\begin{conjecture} A Fermat prime is a Fermat number $F_n = 2^{2^n } + 1$ that is prime. The only known Fermat primes are F_0 =3,F_1=5,F_2=17,F_3 =257 ,F_4=65537 It is unknown if other fermat primes exist. % Enter your conjecture in LaTeX % You may change "conjecture" to "question" or "problem" if you prefer. \end{conjecture}
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