RPS Megabit Drive 1

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Overview

RPS Megabit Drive 1 - Ongoing

Project	Riesel Prime Search
Drive name	RPS Megabit Drive 1
Purpose	Search for Riesel primes for k < 300 and n > 1000000
Current status	Multi Reservation 4: The current nmax = 3,100,000 as of 2020-11-12
Date start	2010-10-24
k-values	35 - 111
n-range	1000000 -
Sieve	File:RPS Megabit Drive 1 sieve.zip
Primes found	39 new
Link	Thread at MersenneForum

k-history

2010-10-24: k = 51, 57, 61, 65, 69, 87 for n > 1,000,000

2011-01-26: adding k = 47, 53 for n > 1,000,000

2014-08-12: removing k = 51, 69 for n > 2,500,000

2014-08-12: adding k = 35 for n > 2,520,000, k = 37 for n > 2,500,000 only n != 1 mod 10, k = 103 for n ≥ 2,550,223, and k = 111 for n ≥ 2,601,487

currently k = 35, 37, 47, 53, 57, 61, 65, 87, 103, 111

Reservation history

The data file can be found here. Notes:

• To identify a post of the MersennForum thread the date and post number are given.
• If a post number is given with '1' there's no information from the thread, so the first post is used instead.

Range (kByte)	#cand.	Contributor	Reserved	Done
1000-1003	963	Predrag Minovic	2010-10-24 (2)	2010-11-07 (22)

Primes table

k-value	Nash	Candidates	n-range	# primes	prime(s) for n
35	1264		2520000-	0
37 #	630		2500000-	0
47	922		1000000-1653000, 1692000-	1	1025950
51	1550		1000000-1620000, 1687162-2500000	3	1026910, 1027635, 1231665
53	1368		1000000-1653000, 1684000-	1	1632590
57	2672		1000000-1620000, 1679288-	6	1098272, 1110980, 1486214, 2103370, 2639528, 3093440
61	2170		1000000-1620000, 1674483-	8	1124049, 1416365, 1487125, 1734983, 2134577, 2381887, 2580689, 2936967
65	2034		1000000-1620000, 1669972-	7	1374574, 1421088, 1505640, 2450614, 2583720, 2876718, 3080952
69	3438		1000000-1620000, 1665716-2500000	5	1473217, 1566375, 2174213, 2410035, 2428251
87	2839		1000000-1620000, 1652000-	7	1089098, 1120006, 1332741, 1358189, 1616138, 1852590, 2518122
103	1373		2550223-	0
111	2954		2601487-	1	3060238

#: Only n != 1 mod 10 is searched.

Notes

Sieve file for 3,000,000 < n < 4,000,000 available (LLR-format, 290,225 candidates).

Riesel Prime Search

Miscellaneous

Main

Current work

Megabit Drive‎ 1

Completed

Drive 1 Drive 2 Drive 3 Drive 4 Drive 5 Drive 6 Drive 7 Drive 8 Drive 9 Drive 10 Drive 11 Drive 12 Megabit Drive‎ 2 Megabit Drive‎ 3

Individual k-searches

k=5 k=15 k=17

Others