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GFN-131072 Mega Prime!

So, 23.09.2017 - 14:28
On 14 September 2017, 23:21:44 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime: 47179704^131072+1 The prime is 1,005,815 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 26th for Generalized Fermat primes and 250th overall. The discovery was made by Andrei Okhrimouk (AndreiO) of Australia using an NVIDIA Geforce GTX 960 series GPU in an Intel(R) Core(TM)2 Duo CPU at 2.80GHz with 4GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 21 minutes to probable prime (PRP) test with GeneferOCL2. The PRP was confirmed prime by an Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz with 16GB RAM, running Microsoft Windows 7 Ultimate Edition. This computer took about 2 hours 42 minutes to complete the primality test using multithreaded LLR. For more details, please see the official announcement.
Kategórie: Novinky z projektov

PRPNet September Challenge

Pi, 22.09.2017 - 15:12
Factorial Equinox Challenge The equinoxes are the only times when the solar terminator (the "edge" between night and day) is perpendicular to the equator. As a result, the northern and southern hemispheres are equally illuminated. The Latinate names vernal equinox (spring) and autumnal equinox (fall) are often used. To celebrate we're running a PRPNet challenge at the FPS (factorial prime search) from 22nd 12:00 UTC until 27th of September 12:00 UTC. To take part, you have to activate the following line in prpclient.ini: server=FPS:100:1:prpnet.primegrid.com:12002 Stats will be available at the well known place here. All previous PRPNet challenge stats can be found here. Discussion and more information can be found here: 2017 PRPNet September Challenge. Good luck!
Kategórie: Novinky z projektov

Another PPS-Mega Prime!

So, 16.09.2017 - 12:23
On 15 September 2017, 11:01:15 UTC, PrimeGrid’s PPS Mega Prime Search project found the Mega Prime: 1127*2^3427219+1 The prime is 1,031,699 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 203rd overall. The discovery was made by Randall Scalise (Randall J. Scalise) of the United States using an Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz with 6GB RAM, running Linux. This computer took about 1 hour 13 minutes to complete the primality test using LLR. The prime was verified on 15 September 2017, 22:09:16 UTC by Hans-Jürgen Bergelt (Hans-Jürgen Bergelt) of Germany using an Intel(R) Core(TM) i7-3960X CPU @ 3.30GHz with 8GB RAM, running Microsoft Windows 7. This computer took about 1 hour 49 minutes to complete the primality test using LLR. Hans-Jürgen is a member of the SETI.Germany team. For more details, please see the official announcement.
Kategórie: Novinky z projektov

We Need Your Help!

Pi, 15.09.2017 - 22:40
In the past, donations were nice to have, but not critical to our operation. As you likely already know, RackSpace is ending our free hosting. While all of the PrimeGrid admins volunteer their effort, equipment, and electricity, as do all of its members, PrimeGrid needs to find and afford a home. In choosing a path forward, we have considered both current and ongoing costs, as well as maintaining quality of service at the levels to which we've become accustomed. In doing so, the best option for PrimeGrid is to purchase servers and house them at a paid colocation service. Moving forward, PrimeGrid needs to cover the 3,500 euro cost of the initial hardware purchase, and then needs to start covering the costs of colocation. Ultimately, we will need to plan for hardware lifecycle as well. We are quite appreciative of the donations we have received towards this effort, and you can see our progress here: https://www.primegrid.com/donations.php where it quickly becomes evident that we still have a ways to go. Your contributions are greatly appreciated and will help keep PrimeGrid strong and viable in the years ahead. We have done a lot of great work here, and hope to ensure its continued success.
Kategórie: Novinky z projektov