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Search: Posts Made By: nuggetprime
Forum: Software 2011-05-16, 18:52
Replies: 16
Views: 2,658
Posted By nuggetprime
Bug: segfaults when testing 1525*2^700391-1,...

Bug: segfaults when testing 1525*2^700391-1, before starting LL loop.
Seems to fail for every large-k/large-n combination.

Nugget:smile:
Forum: No Prime Left Behind 2011-05-12, 18:14
Replies: 688
Views: 42,786
Posted By nuggetprime
1525*2^700391-1 is prime

1525*2^700391-1 is prime
Forum: No Prime Left Behind 2011-04-01, 17:20
Replies: 688
Views: 42,786
Posted By nuggetprime
Guys, I believe I've got something! ...

Guys, I believe I've got something!
1817*2^700256-1 is prime!

was lucky apparently
Forum: Conjectures 'R Us 2011-03-30, 14:55
Replies: 3,682
Views: 215,402
Posted By nuggetprime
R830 complete to n=25K. 13 k remain. Base...

R830 complete to n=25K. 13 k remain.
Base released.
Primes found and remaining k are attatched.
Forum: No Prime Left Behind 2011-03-26, 13:42
Replies: 61
Views: 20,159
Posted By nuggetprime
I'd like something to test offline for my new...

I'd like something to test offline for my new cruncher,1K seems reasonable to start.
So I'm taking 700K-701K.
Please send me the files to ilikelinustorvalds AT gmail DOT com, in 4 n=250 blocks....
Forum: GPU Computing 2011-03-19, 14:48
Replies: 359
Views: 35,602
Posted By nuggetprime
Have you got a GPU where you can test how much...

Have you got a GPU where you can test how much slower it is with 4 instances than with 1?
From what I read in the previous posts,speed at the moment is about that of 1-1.5 cores of a cheap quadcore...
Forum: GPU Computing 2011-03-19, 13:57
Replies: 359
Views: 35,602
Posted By nuggetprime
This is a question to msft: Is it possible to...

This is a question to msft:
Is it possible to implement testing multiple candidates at the same time on one GPU? I think this would greatly improve throughput. Just like on a quad-core CPU you get...
Forum: Math 2011-03-18, 20:11
Replies: 2
Views: 919
Posted By nuggetprime
Probability of factor (TF)

Hi,
Is there a formula / excel spreadsheet anywhere which lets me calculate the probablility that I find a factor for Mn by trial factoring from x to x+1 bits, with no previously known factor?
...
Forum: Hardware 2011-03-05, 19:07
Replies: 0
Views: 759
Posted By nuggetprime
AMD Core unlock, stability?

I wonder who here is using an athlon x3 or phenom x2/x3 and has the 3rd/4th core unlocked on it.
If you tried this,please tell me if it passed the prime95/mprime stresstest for you or not,so i can...
Forum: No Prime Left Behind 2011-02-28, 13:40
Replies: 272
Views: 54,048
Posted By nuggetprime
k=325 n=1000K-1100K completed. No primes found.

k=325 n=1000K-1100K completed. No primes found.
Forum: Conjectures 'R Us 2011-02-23, 12:46
Replies: 118
Views: 13,404
Posted By nuggetprime
Off topic, but why is 6 not the conjectured k for...

Off topic, but why is 6 not the conjectured k for R1031 if it has trivial factors?
Forum: GPU Computing 2011-02-23, 12:43
Replies: 2,817
Views: 214,927
Posted By nuggetprime
what gpu do you have? It probably isn't...

what gpu do you have?
It probably isn't possible to run primality tests on it since it doesn't support double precision(same as mine:smile:).
But you can still do sieving/TF on it, things for which...
Forum: Software 2011-02-23, 12:31
Replies: 24
Views: 1,643
Posted By nuggetprime
BUMPed. Also forwarded to Jean Penne.

BUMPed.
Also forwarded to Jean Penne.
Forum: No Prime Left Behind 2011-02-18, 19:34
Replies: 568
Views: 90,348
Posted By nuggetprime
Sorry,but preinstalled-in-case power supplies are...

Sorry,but preinstalled-in-case power supplies are about the lowest grade ones you can get:smile:
From personal experience, I would recommend an OCZ StealthXStream model. A 500W one can be had for...
Forum: Software 2011-02-18, 17:57
Replies: 24
Views: 1,643
Posted By nuggetprime
Another problem

./llr-3.8.5 -d -q5*10^19737+3
Starting probable prime test of 5*10^19737+3
...
Forum: Software 2011-02-18, 17:51
Replies: 24
Views: 1,643
Posted By nuggetprime
Normally,LLR outputs when it can't prove a number...

Normally,LLR outputs when it can't prove a number prime:
Starting probable prime test of 2^21954+77899
2^21954+77899 is base 3-Strong Fermat PRP! Time : 1.728 sec.
Starting Lucas sequence...
Forum: Software 2011-02-18, 16:33
Replies: 24
Views: 1,643
Posted By nuggetprime
Yet another LLR bug

I have observed the following in LLR version 3.8.5:
When testing 10^500+961, LLR tells me:

Starting probable prime test of 10^500+961

10^500+961 is not prime, although base 3-Fermat PSP!! ...
Forum: Conjectures 'R Us 2011-02-18, 12:30
Replies: 1,660
Views: 102,612
Posted By nuggetprime
Primes for S42

Primes from n=25K to n=35K:
9302*42^28384+1
1209*42^28486+1
179*42^29067+1
6530*42^31152+1
7311*42^34544+1

All verfified using pfgw -tc option.
Forum: No Prime Left Behind 2011-02-18, 12:20
Replies: 568
Views: 90,348
Posted By nuggetprime
Just courious,what PSUs is Gary using on his...

Just courious,what PSUs is Gary using on his machines?
Low-quality power supplies can both go bad fairly soon and damage or reduce lifespan of your mobo/graphics card due to voltage spikes and...
Forum: Software 2011-02-18, 12:06
Replies: 5
Views: 781
Posted By nuggetprime
That's about 8 times slower than on my P4,so Atom...

That's about 8 times slower than on my P4,so Atom can't really impress for primality testing.
Does anybody know some other low-power system (<20 W) that has better performance for this kind of work?
Forum: No Prime Left Behind 2011-02-17, 20:45
Replies: 19
Views: 8,390
Posted By nuggetprime
Thanks for letting me know,sieving stopped. ...

Thanks for letting me know,sieving stopped.
Sadly,I can't access the PrimeSearchTeam forum because it's password protected.

Nugget
Forum: No Prime Left Behind 2011-02-17, 20:24
Replies: 19
Views: 8,390
Posted By nuggetprime
Reserving 50000-50010 G for the start. Yes,I know...

Reserving 50000-50010 G for the start. Yes,I know that's tiny,but I just have a GT 240 to help out and it's not one of the fastest GPUs out there:smile:
I hope it's OK that I reserve such a small...
Forum: Software 2011-02-17, 19:46
Replies: 5
Views: 781
Posted By nuggetprime
Gimme Atom timings!

Yes,I know Atoms suck somewhat for number crunching stuff,but I'm still interested in timings as I'm planning to extend my crunchforce by something low-power which will run 24/7.
I'm not that...
Forum: Puzzles 2011-02-17, 18:00
Replies: 14
Views: 1,204
Posted By nuggetprime
thx had not used exponentation in my...

thx
had not used exponentation in my calculations.
lets see if I cand find something for n=39
Forum: Conjectures 'R Us 2011-02-17, 15:01
Replies: 3,682
Views: 215,402
Posted By nuggetprime
Status update: R830 is at n=17300,15 k...

Status update:
R830 is at n=17300,15 k remaining.
Slow but going.

Nugget
Showing results 1 to 25 of 302

 
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