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

Join PrimeGrid

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : News : New SR5 Mega Prime!

Author Message
Van ZimmermanProject donor
Volunteer moderator
Volunteer tester
Project scientist
Send message
Joined: 30 Aug 12
Posts: 1692
ID: 168418
Credit: 3,864,917,846
RAC: 4,756,490
321 LLR Jade: Earned 10,000,000 credits (12,546,899)Cullen LLR Jade: Earned 10,000,000 credits (11,076,874)ESP LLR Jade: Earned 10,000,000 credits (10,288,341)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (11,925,834)PPS LLR Jade: Earned 10,000,000 credits (14,114,452)PSP LLR Jade: Earned 10,000,000 credits (17,826,235)SoB LLR Jade: Earned 10,000,000 credits (12,283,763)SR5 LLR Jade: Earned 10,000,000 credits (11,284,277)SGS LLR Jade: Earned 10,000,000 credits (10,484,325)TRP LLR Jade: Earned 10,000,000 credits (13,328,085)Woodall LLR Jade: Earned 10,000,000 credits (11,831,430)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (18,073,742)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,000,651,011)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,189,695)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,102,079)AP 26/27 Emerald: Earned 50,000,000 credits (50,488,984)GFN Double Ruby: Earned 2,000,000,000 credits (2,470,332,693)PSA Double Bronze: Earned 100,000,000 credits (168,236,054)
Message 110535 - Posted: 29 Sep 2017 | 14:22:32 UTC
Last modified: 25 Oct 2017 | 10:11:08 UTC

On 17 September 2017, 20:18:24 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=301562 by finding the mega prime:

301562*5^2408646-1

The prime is 1,683,577 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 57th overall. 72 k's now remain in the Riesel Base 5 Problem.

The discovery was made by Håkan Lind (sangis43) of Sweden using an Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz with 32 GB RAM running Microsoft Windows 7 Professional Edition. This computer took about 43 hours 57 minutes to complete the primality test using LLR. Håkan is a member of the Sicituradastra. Team.

The prime was verified on 24 October 2017, 13:28:04 UTC, by Nilay Khandelwal (Nilay Khandelwal) of India using an Intel(R) Core(TM) i7-4790K CPU @ 4.00 GHz with 16 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 2 days 12 hours 53 minutes to complete the primality test using LLR.

For more details, please see the official announcement.

Post to thread

Message boards : News : New SR5 Mega Prime!

[Return to PrimeGrid main page]
Copyright © 2005 - 2017 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.08, 1.08, 1.43
Generated 12 Dec 2017 | 0:36:10 UTC