Yet Another GFN-131072 Mega Prime!

[Dirk Broer]

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

46413358^131072+1 (http://primes.utm.edu/primes/page.php?id=123457)

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

The discovery was made by Sagi Iltus (sagiil (https://www.primegrid.com/show_user.php?userid=456643)) of Israel 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 (https://www.primegrid.com/show_user.php?userid=72063)) 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 (http://www.primegrid.com/team_display.php?teamid=14) 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 (http://www.primegrid.com/download/GFN-46413358_131072.pdf).

[Dirk Broer]

The Athlon 5350 (http://www.cpu-world.com/CPUs/Jaguar/AMD-Athlon%205350%20-%20AD5350JAH44HM.html),
The ASUS AM1I-A (https://www.asus.com/Motherboards/AM1IA/) where it's in,
The 16 Gb RAM (http://eu.crucial.com/eur/en/blt2c8g3d1608et3lx0ceu).
http://devacron.com/wp-content/uploads/2014/07/AMD_5350_Kabini.jpg
https://www.asus.com/websites/global/products/BDasNTuxC8rXk3JB/line.jpg
http://eu.crucial.com/wcsstore/CrucialSAS/images/resources/medium/package/ballistix240-pindimmballistixtacticalkit-2ddr3hs-lp.png

[NeoGen]

Aww man, that was close! You almost caught a big one Dirk.

[Dirk Broer]

It shows that you can do serious work on an AM1 system anyway. Look at the hardware those other two had.

[vaughan]

Nice work Dirk. Keep plugging on and keep the cache at 0 days!

[Dirk Broer]

Thanks Vaughan. Already back in Oz, or still in Europe?

[Brucifer]

Cool beans Dirk!!!! :-)

[Paul AMD]

Nice one Dirk!

[vaughan]

I'm still in Italy, we went to the Colosseum here in Rome today. It was a hot walk. Visiting Trevi Fountain and Spanish Steps tomorrow.

My computers are mostly having a holiday too. I'm saving heaps on electricity; in fact the solar PV is actually running in credit for the first time. We "made" 87 cents last month! Woot.

[Dirk Broer]

in fact the solar PV is actually running in credit for the first time. We "made" 87 cents last month! Woot.
Either the rates are rotten, or you need more solar cells...

[NeoGen]

Either the rates are rotten, or you need more solar cells...
No, it was last month, vaughan was running the fleet so there was little to no power left to spare. Now if the fleet is on holiday then he's really going to get some good credits. :icon_mrgreen:

[vaughan]

Either the rates are rotten, or you need more solar cells...

Roof is maxed out with panels.

Yes was last month so I only switched off the computers on May 25 giving just a few days of winter sun to generate power. I noticed our background usage is about 2Kw/h, fridge, lights home usage with my son there and I guess air conditioner on heating in his room. Naturally he will have multiple computers running too plus his gaming machine.