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

Sierpiński-Riesel Base 5

From Prime-Wiki
Jump to: navigation, search

The Sierpiński-Riesel Base 5 Project is a distributed computing project. It was formerly managed by users of, and is currently a subproject on PrimeGrid.


Sierpiński-Riesel Base 5 tries to prove that k=159986 is the smallest possible Sierpiński number base 5 and that k=346802 is the smallest possible Riesel number base 5. To prove this, one must find primes for all k below the smallest known number.

How to participate

Participants in either of the projects reserve a k in the forum, then use NewPGen to sieve and then LLR to PRP test (for primality). After that, users unreserve their k again if no primes are found. Instructions to the project can be found at OmbooHankvalds guidepages.


The correct countings are shown only if every k-value has its own page.


External links