PrimeGrid
Please visit donation page to help the project cover running costs for this month

Toggle Menu

Join PrimeGrid

  1. Read our rules and policies.
  2. Download, install and run the BOINC software used by PrimeGrid.
  3. When prompted, enter the URL:
    http://www.primegrid.com/
  4. Select which subprojects to run via the PrimeGrid Preferences.

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : News : World Record Generalized Cullen Prime

Subscribe Sort
Author Message
JohnProject donor
Honorary cruncher
Avatar
Send message
Joined: 21 Feb 06
Posts: 2876
ID: 2449
Credit: 2,681,934
RAC: 0
321 LLR Bronze: Earned 10,000 credits (11,773)Cullen LLR Bronze: Earned 10,000 credits (14,945)ESP LLR Bronze: Earned 10,000 credits (26,855)PPS LLR Bronze: Earned 10,000 credits (84,876)PSP LLR Bronze: Earned 10,000 credits (15,311)SoB LLR Bronze: Earned 10,000 credits (21,440)SR5 LLR Bronze: Earned 10,000 credits (29,270)SGS LLR Bronze: Earned 10,000 credits (26,616)TPS LLR (retired) Bronze: Earned 10,000 credits (36,288)TRP LLR Bronze: Earned 10,000 credits (41,655)Woodall LLR Bronze: Earned 10,000 credits (15,807)321 Sieve Bronze: Earned 10,000 credits (20,014)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (23,405)PPS Sieve Bronze: Earned 10,000 credits (36,192)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,306)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,738)GFN Bronze: Earned 10,000 credits (86,217)PSA Ruby: Earned 2,000,000 credits (2,143,756)
Message 48137 - Posted: 30 Jan 2012 | 2:12:11 UTC
Last modified: 2 Mar 2012 | 15:43:28 UTC

On 29 Jan 2012, 08:10:03 UTC, PrimeGrid’s PRPNet found the largest known generalized Cullen prime: 427194*113^427194+1

The prime is 877,069 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 1st for generalized Cullen primes and 57th overall.

The discovery was made by Ricky L. Hubbard (MiHost) of the United States using an AMD Phenom II X6 1090t @ 3.2GHz with 8GB RAM, running Windows 7. This computer took 7 hours and 15 minutes to complete the probable prime test using pfgw64 and 7 hours 20 minutes to complete the primality test again using pfgw64. Ricky is a member of the AMD Users Team.

For more details, please see the official announcement.
____________

ID: 48137 | Report as offensive
Michael Millerick
Volunteer tester
Send message
Joined: 4 Feb 09
Posts: 652
ID: 35074
Credit: 130,106,059
RAC: 122,243
321 LLR Amethyst: Earned 1,000,000 credits (1,063,954)Cullen LLR Gold: Earned 500,000 credits (665,748)ESP LLR Amethyst: Earned 1,000,000 credits (1,025,432)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (870,153)PPS LLR Turquoise: Earned 5,000,000 credits (6,700,552)PSP LLR Amethyst: Earned 1,000,000 credits (1,134,556)SoB LLR Amethyst: Earned 1,000,000 credits (1,064,898)SR5 LLR Amethyst: Earned 1,000,000 credits (1,043,015)SGS LLR Amethyst: Earned 1,000,000 credits (1,078,249)TRP LLR Amethyst: Earned 1,000,000 credits (1,026,807)Woodall LLR Amethyst: Earned 1,000,000 credits (1,042,977)321 Sieve Ruby: Earned 2,000,000 credits (2,096,785)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,911,344)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,077,092)PPS Sieve Sapphire: Earned 20,000,000 credits (45,656,762)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,034,014)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,774)AP 26/27 Ruby: Earned 2,000,000 credits (3,898,270)GFN Ruby: Earned 2,000,000 credits (4,388,283)PSA Sapphire: Earned 20,000,000 credits (47,256,391)
Message 48149 - Posted: 30 Jan 2012 | 6:55:56 UTC

This is great news, but it is too bad for him that it didn't come during February...
____________

ID: 48149 | Report as offensive
Snoopy
Avatar
Send message
Joined: 5 Jan 12
Posts: 9
ID: 125918
Credit: 5,350,741
RAC: 8,649
321 LLR Bronze: Earned 10,000 credits (14,418)PPS LLR Bronze: Earned 10,000 credits (28,606)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (281,010)PPS Sieve Amethyst: Earned 1,000,000 credits (1,048,381)AP 26/27 Silver: Earned 100,000 credits (137,462)GFN Ruby: Earned 2,000,000 credits (3,817,518)
Message 48160 - Posted: 30 Jan 2012 | 14:20:18 UTC

In BOINC Manager, the link to the official announcement (pdf) is not correct :)

http://www.primegrid.com/download/gc113-427194.pdf website
http://www.primegrid.com/download/gw113-427194.pdf manager
____________


Blog: http://nikolaovcharski.com/blog/

ID: 48160 | Report as offensive

Message boards : News : World Record Generalized Cullen Prime

[Return to PrimeGrid main page]
DNS Powered by DNSEXIT.COM
Copyright © 2005 - 2019 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.25, 1.61, 2.30
Generated 18 Oct 2019 | 7:22:59 UTC