Topics Register • News • History • How to • Sequences statistics • Template prototypes

Riesel number

From Prime-Wiki
Revision as of 10:46, 8 June 2020 by Karbon (talk | contribs) (more links)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Logo.svg This article is only a stub. You can help PrimeWiki by expanding it.

A Riesel number is a value of k such that k•2n-1 is always composite for all natural numbers.

Using the same method presented in the Sierpiński problem article, Hans 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