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Solve the Problem 22n+12 ^ { 2 ^ { n } } + 1

Question 65

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-Fermat conjectured that the formula 22n+12 ^ { 2 ^ { n } } + 1 would always produce a prime for any whole number n\mathrm { n } . The sixth Fermat number is 225+12 ^ { 2 ^ { 5 } } + 1 . Evaluate this number. In seeking possible prime factors of this Fermat number, what is the largest potential prime factor that one would have to try?

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Sixth Fermat number = 4,294,96...

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