The 4th RPS-Drive

Compiled by kar_bon. Let me know if there are any errors.

Started: Nov 20, 2007
Last update: Dec 06, 2007

This page is a Summary of the 4th Team Drive from Riesel Prime Search.

The goal of this drive was to search for primes of the form k·2n-1 for the following 21 k's < 300:
91, 109, 203, 205, 211, 215, 217, 241, 245, 257, 259, 263, 265, 271, 275, 281, 283, 287, 293, 295, 299.

Basic information:

StatusThe drive is over!
StartedJuly 28, 2006
EndedDecember 16, 2006
Range nvarious < n < 600k (see table below)
Contributors sieveLSoule, segmtfault, Kosmaj
Sieve depth3·1012
Contributors LLR
(primes found)
amphoria(6), Arminius, Battlemaxx(1), CedricVonck, Citrix, grobie, John(1),
Kosmaj(12), LSoule(5), segmtfault, Thomas(10), VBCurtis
Candidates for LLR222033
Primes found35 new
LinkRPS-Forum

Data table:

knash
weight
min_n# candidates# primesprime for n
91 2374300k161653313849, 535819, 563469
109594 350k35790-
2031687260k130963313474, 455190, 480918
2051351250k113012420297, 462261
2111039260k77161262877
2152245250k175031331784
217806 260k60093327829, 377581, 398605
2411600260k122183336197, 407709, 497679
2451419260k113460-
2571867320k120571541402
2591561260k119296278567, 316403, 347159, 423467, 425257, 427623
2631215260k90990-
2652008260k150661323083
2711510260k115954274509, 322971, 342349, 470529
2751581260k122041398928
281937 260k73170-
283597 260k43860-
2871307260k100051525378
2931483260k109202421330, 517242
2951266260k90062374035, 389903
2991199260k95161295640

Detailed range overview:

Will be done with the next update.