mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 31
Search took 0.01 seconds.
Search: Posts Made By: nuutti
Forum: Programming 2008-04-06, 21:50
Replies: 3
Views: 2,204
Posted By nuutti
Intel Advanced Vector Extensions (256-bit SSE)

256-bit SSE. More material here:
http://softwareprojects.intel.com/avx/

and programming manual with all new instructions (693 pages)

Intel® Advanced Vector Extensions Programming Reference ...
Forum: Software 2006-11-21, 15:27
Replies: 1
Views: 534
Posted By nuutti
SSE4

Does this SSE4 have any potential for improvemets for this project?

I noticed that there is Floating Point Dot Product
DPPS, DPPD

Source:...
Forum: Programming 2006-10-03, 00:50
Replies: 63
Views: 5,625
Posted By nuutti
Actually there is! namely BSF—Bit Scan...

Actually there is!
namely
BSF—Bit Scan Forward
BSR—Bit Scan Reverse

and these are quite fast in current intel computers. (latency is 2 in Core 2 and 4 in P4)

You can use these from inline...
Forum: Operazione Doppi Mersennes 2005-07-05, 19:18
Replies: 22
Views: 6,524
Posted By nuutti
64-bit version timing

here is screenshot.

Nuutti
Forum: LMH > 100M 2005-06-27, 13:46
Replies: 351
Views: 20,361
Posted By nuutti
You should test prime95 with these big numbers....

You should test prime95 with these big numbers. Like check
332192831 -> 332199999 and verify that prime95 finds all known factors.
In prime95 code is different for factors less than 32-bit so ...
Forum: Software 2005-06-25, 00:03
Replies: 45
Views: 2,949
Posted By nuutti
M2147483647 factoring with 32-bit version

It found two factors:
[Sat Jun 25 00:18:40 2005]
M2147483647 has a factor: 295257526626031
[Sat Jun 25 00:19:00 2005]
M2147483647 has a factor: 87054709261955177


but it didn't found the...
Forum: Software 2005-06-24, 21:07
Replies: 45
Views: 2,949
Posted By nuutti
prime95 24.12 RC3 64-bit version

tested 64-bit version. I was able to find these factors:
D: S340437/C66244893, M2147483647 has a factor: 295257526626031
[Fri Jun 24 21:41:29 2005]
UID: S340437/C66244893, M2147483647 has a...
Forum: Operazione Doppi Mersennes 2005-06-24, 21:02
Replies: 22
Views: 6,524
Posted By nuutti
prime95 24.12 RC3 64-bit version

I tested 64-bit version. I was able to find these factors:
D: S340437/C66244893, M2147483647 has a factor: 295257526626031
[Fri Jun 24 21:41:29 2005]
UID: S340437/C66244893, M2147483647 has a...
Forum: Operazione Doppi Mersennes 2005-06-24, 00:17
Replies: 22
Views: 6,524
Posted By nuutti
I tried: ...

I tried:
AdvancedFactor=2147483647,2147483647,10,70
and here is result (took about 2-3 hours with 3,2 Ghz P4):

UID: nuutti/home, M2147483647 no factor from 2^9 to 2^70, Wc1: 302ED088


Yours,...
Forum: Operazione Doppi Mersennes 2005-06-23, 14:03
Replies: 22
Views: 6,524
Posted By nuutti
I put Factor=1999999973,76 in worktodo.ini...

I put
Factor=1999999973,76
in worktodo.ini file.

2^31-1 = 2147483647 does not work.


Nuutti
Forum: Operazione Doppi Mersennes 2005-06-22, 21:13
Replies: 22
Views: 6,524
Posted By nuutti
>Though I see that the latest version of George...

>Though I see that the latest version of George Woltman's Prime95 allows
>trial-factoring exponents as large as "2 billion" - if that means up to 2^31, it
>could be used as well for M(M31) - I...
Forum: Math 2004-05-15, 15:02
Replies: 131
Views: 15,596
Posted By nuutti
I have few additional questions regarding P-1...

I have few additional questions regarding P-1 factoring and prime95.

I started (no good reason) to run:
Pminus1=67108864,4000000,5000000,0,0

so my B1 = 4,000,000 and B2 = 5,000,000

After my...
Forum: Software 2004-05-05, 21:31
Replies: 9
Views: 1,267
Posted By nuutti
How much faster GMP-ECM 5 is in p-1 factoring in...

How much faster GMP-ECM 5 is in p-1 factoring in the stage 2?

I am currently running P-1 for:
Pminus1=67108864,4000000,5000000,0,0

Can I use GMP-ECM 5 for runnig stage 2 in my test ?
(I have...
Forum: Math 2004-04-20, 00:36
Replies: 131
Views: 15,596
Posted By nuutti
OK. I made some testing. Seems to work: P-1...

OK. I made some testing. Seems to work:

P-1 found a factor in stage #1, B1=20000.
M67108864 has a factor: 204393464266227713
[Tue Apr 20 03:03:59 2004]
P-1 found a factor in stage #2, B1=20000,...
Forum: Math 2004-04-18, 23:22
Replies: 131
Views: 15,596
Posted By nuutti
This is a little bit off topic but I would like...

This is a little bit off topic but I would like to know if
it is possible to use P-1 factoring same way as ECM factoring using prime95.
I mean that is is possible to search factors of all fermat...
Forum: Math 2004-04-16, 14:26
Replies: 131
Views: 15,596
Posted By nuutti
One timing more :-) [Fri Apr 16 14:43:44...

One timing more :-)

[Fri Apr 16 14:43:44 2004]
M67108864 completed 1 ECM curves, B1=50000, B2=5000000

Stage 1 complete. Time 125,795 sec.
Stage 2 init complete. Time: 1057 sec.
Stage 2...
Forum: Math 2004-04-13, 14:10
Replies: 131
Views: 15,596
Posted By nuutti
Prime95 version 23.8.1 Running time for...

Prime95 version 23.8.1

Running time for ECM33554432, B1=250,000, B2=25,000,000
Stage 1 complete. Time 287,185 sec.
Stage 2 init complete. Time: 826 sec.
Stage 2 complete. Time 234,145 sec....
Forum: Software 2004-04-08, 08:29
Replies: 4
Views: 751
Posted By nuutti
I think that you need savefile from person who...

I think that you need savefile from person who did original p-1 factoring.
So answers is practically no.

nuutti
Forum: Math 2004-04-08, 06:14
Replies: 131
Views: 15,596
Posted By nuutti
Factor is found in the gcd stage. Nuutti

Factor is found in the gcd stage.

Nuutti
Forum: Software 2004-04-07, 21:43
Replies: 17
Views: 2,989
Posted By nuutti
Does anyone have idea/estimate about 64-bit code...

Does anyone have idea/estimate about 64-bit code (potential) speed gain in the ecm factoring ?

I just run few curves to M33554432 and started to wonder if there is any nice speedup to gain using...
Forum: Math 2004-04-07, 21:09
Replies: 131
Views: 15,596
Posted By nuutti
Buy the way. May be everyone is not aware that...

Buy the way. May be everyone is not aware that there is money price for Fermat Factors:

http://www.perfsci.com/prizes.html

Fermat-factor prizes (deadline now extended to end of 2004)

PSI...
Forum: Math 2004-04-07, 14:04
Replies: 131
Views: 15,596
Posted By nuutti
Another curve: [Wed Apr 07 15:33:10 2004] ...

Another curve:
[Wed Apr 07 15:33:10 2004]
M33554432 completed 1 ECM curves, B1=50000, B2=5000000

Stage 1 complete. Time 58967 sec.
Stage 2 init complete Time: 834 sec.
Stage 2 complete. Time:...
Forum: Math 2004-04-06, 11:06
Replies: 131
Views: 15,596
Posted By nuutti
My first curve finished: [Tue Apr 06...

My first curve finished:

[Tue Apr 06 08:22:58 2004]
M33554432 completed 1 ECM curves, B1=50000, B2=5000000

Stage 1 complete. Time 59000 sec. (not accurate)
Stage 2 init complete Time: 830...
Forum: Math 2004-04-05, 22:13
Replies: 131
Views: 15,596
Posted By nuutti
Some preliminary results from M33554432,B1=50000 ...

Some preliminary results from M33554432,B1=50000
Stage 1 took about 59,000 seconds and it seems that stage 2 will take about 60,000 seconds. Initialization time not included (stage 2). Right now...
Forum: Math 2004-04-05, 09:42
Replies: 131
Views: 15,596
Posted By nuutti
Memory allocation: CPUHours=24 DayMemory=1800...

Memory allocation:
CPUHours=24
DayMemory=1800
NightMemory=1800

I will post some timings when at least one curve have finished :-)
I have P4 3.2 GHz (Northwood).

Nuutti
Showing results 1 to 25 of 31

 
All times are UTC. The time now is 10:09.

Tue Nov 24 10:09:51 UTC 2020 up 75 days, 7:20, 4 users, load averages: 1.81, 2.10, 2.66

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.