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-   -   New Fermat factors (https://www.mersenneforum.org/showthread.php?t=15449)

ET_ 2012-03-30 16:42

[QUOTE=rogue;294856]I noticed that. Now I just need to find one myself.

Note that this could be a screamer app if run on a GPU. I've thought about it, but I just don't have the time necessary for it.[/QUOTE]

I did the same, and have some very rough code to start with. And the correct GMP libraries to implement mp math on CUDA...

What I desperately lack is time. :sad:

Luigi

rogue 2012-03-30 18:26

[QUOTE=ET_;294857]I did the same, and have some very rough code to start with. And the correct GMP libraries to implement mp math on CUDA...[/QUOTE]

I would suggest aiming for OpenCL for the main reason that one wouldn't be locked into using NVIDIA. Most Macs have ATI cards, which can't run CUDA.

ET_ 2012-07-09 10:11

300th Fermat factor found!
 
July 7th, 2012
300th Fermat factor found!
20018578522347 . 2[sup]88[/sup]+1 is a Factor of F[sub]86[/sub]!!!.
The factor was discovered by Michael Dangler of USA, using Mark Rodenkirch's program GMP-Factor, and is the ninth factor discovered this year.
The factor was found using this environment:
[LIST][*]Windows 7 Home Premium 64-bit Operating System[*]Toshiba Satellite P775[*]Intel(R)Core(TM)i7-2670QM CPU @2.20GHZ 6.00 GB Memory[/LIST]
Michael found the factor on its eleventh test-range, after only a few months of testing.
Congratulations from the team of FermatSearch!
-

ET_ 2012-07-10 16:04

July 10th, 2012
New Fermat factor after 3 days!
2674670937447 . 2[sup]171[/sup]+1 is a Factor of F[sub]166[/sub]!!!.
The factor was discovered by Roman Maznichenko from Russia using a AMD FX-8120 @3800MHz and his version of Mark Rodenkirch's GMP-Fermat. This is the fourth factor found by GMP-Fermat, and the second found by Roman Maznichenko.
We have discovered 9 factors in less than 7 months, the same total of the whole 2011, and we keep going!


Luigi

Batalov 2012-09-26 06:07

[COLOR=Green](branched the GFNs to a separate, eponymous, thread)[/COLOR]

I do however hope that this thread, too, will get extended soon, any day now. I am still searching for the word "has"!

rajula 2012-10-09 13:13

Not with mmff (this was with newpgen + pfgw), but still:

143918649*2^4654+1 is a Factor of F4652.

ET_ 2012-10-09 13:22

:groupwave::bow wave::bow wave::bounce wave::party:[QUOTE=rajula;314060]Not with mmff (this was with newpgen + pfgw), but still:

143918649*2^4654+1 is a Factor of F4652.[/QUOTE]

:bow wave::bounce wave::bounce wave::party:

Batalov 2012-10-09 17:26

yay!

LaurV 2012-10-10 05:12

Yarrrr! Two thumbs up! kotgw!
Our factor is cornered, we will catch him soon...

rogue 2012-11-07 00:06

I see that this wasn't posted:

1207*2^410108+1 divides F410105

discovered by Scott Brown via [URL="http://prpnet.mine.nu:12000/user_gfns.html"]PrimeGrid's PPSElow project on PRPNet[/URL]

Batalov 2012-11-07 00:37

I was wondering why there was that gap in W.Keller's reservations:
[CODE]...
73001-80000 20*10^3
80001-390000 10*10^3 Updated!
390001-450000 1200
450000-925000 10*10^3 Updated!
...
[/CODE]
Now, it is clear.

Nice find! (and just at the border of the interval)


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