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

Sponsored by:

Hosted at and sponsored by Rackspace.

Join PrimeGrid

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : News : Yet Another GFN-131072 Mega Prime!

Author Message
Van ZimmermanProject donor
Volunteer moderator
Project administrator
Volunteer tester
Project scientist
Send message
Joined: 30 Aug 12
Posts: 1853
ID: 168418
Credit: 4,914,447,557
RAC: 2,290,245
Discovered the World's First GFN-20 prime!!!Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (20,089,185)Cullen LLR Jade: Earned 10,000,000 credits (15,468,910)ESP LLR Sapphire: Earned 20,000,000 credits (20,089,407)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,037,992)PPS LLR Sapphire: Earned 20,000,000 credits (20,106,782)PSP LLR Sapphire: Earned 20,000,000 credits (20,117,197)SoB LLR Sapphire: Earned 20,000,000 credits (21,208,789)SR5 LLR Jade: Earned 10,000,000 credits (16,228,869)SGS LLR Jade: Earned 10,000,000 credits (14,134,778)TRP LLR Sapphire: Earned 20,000,000 credits (20,619,871)Woodall LLR Jade: Earned 10,000,000 credits (16,893,295)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (20,326,839)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,051,222,753)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 (51,669,540)GFN Double Ruby: Earned 2,000,000,000 credits (3,378,956,181)PSA Double Bronze: Earned 100,000,000 credits (186,983,209)
Message 108421 - Posted: 7 Jun 2017 | 19:24:18 UTC
Last modified: 9 Jun 2017 | 13:58:39 UTC

On 4 June 2017, 04:02:39 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

46413358^131072+1

The prime is 1,004,883 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 23rd for Generalized Fermat primes and 235th overall.

The discovery was made by Sagi Iltus (sagiil) using an Intel(R) Xeon(R) E5-2673 v3 CPU at 2.40GHz with 8GB RAM, running Linux. This CPU took about 7 hours 4 minutes to probable prime (PRP) test with Genefer.

The prime was verified on 7 June 2017, 18:18:37 UTC by Dirk Broer (Dirk Broer) of the British Virgin Islands using an AMD Athlon(TM) 5350 APU with 16GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 4 hours 1 minute to probable prime (PRP) test with GeneferOCL2. Dirk is a member of the AMD Users team.

The PRP was confirmed prime by an Intel(R) Xeon (R) E5-2670 CPU CPU @ 2.60GHz with 32GB RAM, running Linux. This computer took about 15 hours 21 minutes to complete the primality test using LLR.

For more details, please see the official announcement.

Post to thread

Message boards : News : Yet Another GFN-131072 Mega Prime!

[Return to PrimeGrid main page]
Copyright © 2005 - 2018 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 2.12, 2.37, 1.83
Generated 22 Jul 2018 | 15:04:18 UTC