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# RPS Megabit Drive 1

## 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

The data file can be found here.

k-value Nash Candidates n-range(s) # 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).

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