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Difference between revisions of "Riesel number"

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*[http://mathworld.wolfram.com/RieselNumber.html MathWorld]
 
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*[[Wikipedia:Riesel number|Riesel number]]
 
*[[Wikipedia:Riesel number|Riesel number]]
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Revision as of 11:29, 7 March 2019

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A Riesel number is a value of k such that k × 2n - 1 is always composite.

Using the same method presented in the Sierpiński problem article, H.Riesel found in 1956 that 509203 × 2n - 1 is always composite.

In order to demonstrate whether 509203 is the smallest Riesel number or not (the Riesel problem), a distributed computing project was created named Riesel Sieve.

See also

External links

Number classes
General numbers
Special numbers
Prime numbers