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Difference between revisions of "Fermat numbers"

(Created page with "Any number in the form 2^(2^n )+1 where n is any natural number is known as Fermat numbers. Great mathematician Fermat gave the following statement- “Every Fermat number is a p...")
 
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Any number in the form 2^(2^n )+1 where n is any natural number is known as Fermat numbers. Great mathematician Fermat gave the following statement- “Every Fermat number is a prime”.
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Any number in the form 2^(2^n )+1 where n is any natural number is known as a '''Fermat number'''. It was hypothesized by Fermat that every number in this form was prime, but Euler found that the fifth Fermat number can be factored as <math>2^{2^5}+1=641 \cdot 6,700,417</math>.
This statement is true for first four Fermat numbers. But fifth number that is〖  2〗^32+1 is divisible by 641.
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Revision as of 12:26, 2 March 2013

Any number in the form 2^(2^n )+1 where n is any natural number is known as a Fermat number. It was hypothesized by Fermat that every number in this form was prime, but Euler found that the fifth Fermat number can be factored as $2^{2^5}+1=641 \cdot 6,700,417$.

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