15k Search Drive K210885

Overview

15k Search Drive K210885 - This drive is done.

Project	15k Search
Drive name	15k Search Drive K210885
Purpose	Search for Riesel primes of the form 210885•2n-1 to n = 1000000.
Date start	2003-11-24
Date end	2008-01-03
k-values	210885
n-range	230000 - 645000
Primes found	5 new
Link	MersenneForum

k-history

• k-value: k = 210885

n-history

• n-values: n = 230000 - 645000

Primes table

k-value	Nash	n-range	primes for n
210885	5390	230000-645000	270025, 295335, 301665, 315639, 549843

Notes

• The drive was taken over at n = 536000 by the Riesel Prime Search project after it was created on 2005-10-31. Testing for k=210885 was ongoing and began with this post.
• All primes except n=549843 were found by 15k Search. n=549843 was found by Riesel Prime Search.

15k Search

Miscellaneous

Main

Completed

k=65 k=210885 k=2995125705

Historic files

15k Search Contributors

[math]\displaystyle{ \quad }[/math]Low weight :

2004-10-01

[math]\displaystyle{ \quad }[/math]Riesel :

[math]\displaystyle{ \quad }[/math]Stats :

[math]\displaystyle{ \quad }[/math]15k Candidates :

Others