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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

n-history

Sieve history

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 [Expression error: Unrecognized punctuation character "{". 2010-10-24] (2) [Expression error: Unrecognized punctuation character "{". 2010-11-07] (22)

Primes table

Number of candidates for n ≤ 3100000.

k-value Nash Candidates n-range prime(s) for n
35 1264 12517 2520000 -
37 # 630 5303 2500000 -
47 922 33673 1000000 - 1025950
51 1550 40591 1000000 - 2500000 1026910, 1027635, 1231665
53 1368 46485 1000000 - 1632590
57 2672 94011 1000000 - 1098272, 1110980, 1486214, 2103370, 2639528, 3093440
61 2170 79949 1000000 - 1124049, 1416365, 1487125, 1734983, 2134577, 2381887, 2580689, 2936967
65 2034 71164 1000000 - 1374574, 1421088, 1505640, 2450614, 2583720, 2876718, 3080952
69 3438 87057 1000000 - 2500000 1473217, 1566375, 2174213, 2410035, 2428251
87 2839 101880 1000000 - 1089098, 1120006, 1332741, 1358189, 1616138, 1852590, 2518122
103 1373 12918 2550223 -
111 2954 24336 2601487 - 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