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Forum: And now for something completely different 2021-05-12, 22:10
Replies: 65
Views: 7,317
Posted By MrRepunit
I put all known factors from prime exponents with...

I put all known factors from prime exponents with p > 4300000 into one file, this should make it easier to grep for new factors.
Format is (one line per factor)
exponent factor

I just checked...
Forum: And now for something completely different 2021-05-12, 21:15
Replies: 65
Views: 7,317
Posted By MrRepunit
Thank you very much! I will put them into the...

Thank you very much! I will put them into the database and and publish them on Kurt's site.



Cheers,
Danilo
Forum: And now for something completely different 2021-05-12, 19:53
Replies: 65
Views: 7,317
Posted By MrRepunit
But unluckily our results displayed on Kurt's...

But unluckily our results displayed on Kurt's site do not include the results of Serge and Ryan (except for the new PRPs). The dump includes just the results from our own search. I would really like...
Forum: And now for something completely different 2021-04-22, 04:51
Replies: 65
Views: 7,317
Posted By MrRepunit
mprime check confirmed that it is a prime: ...

mprime check confirmed that it is a prime:
[Work thread Apr 22 02:26] (10^5794777-1)/9 is a probable prime! Wh8: FCA5F7FA,00000000


[Thu Apr 22 02:26:59 2021]
{"status":"P", "k":1, "b":10,...
Forum: And now for something completely different 2021-04-21, 20:51
Replies: 65
Views: 7,317
Posted By MrRepunit
Smile Congratulations on finding the next repunit...

Congratulations on finding the next repunit prime, well done.
I can give some infos on the current repunit search that our team is doing:


I extended the original database from skoberne (with...
Forum: GPU Computing 2020-09-20, 20:13
Replies: 32
Views: 24,599
Posted By MrRepunit
Good news, finally I was able to implement...

Good news, finally I was able to implement negative bases.
Also the problem with the 1660 card should be fixed now.
I attached the source code and 64 bit binaries for Linux and Windows.


As...
Forum: GPU Computing 2019-12-15, 00:15
Replies: 32
Views: 24,599
Posted By MrRepunit
Hi. Yes, I can do it if the wished-for changes...

Hi. Yes, I can do it if the wished-for changes are doable in some shorter time. My guess is that you want to lower the minimal exponent limit. Can do it, but than I cannot promise it still works in...
Forum: GPU Computing 2019-11-13, 20:44
Replies: 32
Views: 24,599
Posted By MrRepunit
Up to 2^64 the performance should be really good...

Up to 2^64 the performance should be really good because there is a special 64 bit GPU kernel. To get optimal performance you should disable the stages in mfaktc.ini:
Stages=0
If the desktop...
Forum: GPU Computing 2019-11-05, 21:22
Replies: 32
Views: 24,599
Posted By MrRepunit
The search boundaries are always a power of 2.

The search boundaries are always a power of 2.
Forum: GPU Computing 2019-11-03, 15:02
Replies: 32
Views: 24,599
Posted By MrRepunit
For now yes. At a later point I might create a...

For now yes. At a later point I might create a version that uses the original code path for Mersenne primes, probably once I have included negative bases...
Forum: GPU Computing 2019-11-03, 11:55
Replies: 32
Views: 24,599
Posted By MrRepunit
I figured out the symbols for bases 3, 5, 6, 7,...

I figured out the symbols for bases 3, 5, 6, 7, 8, 10, 11 and 12. All other bases are just testing all remaining possible numbers. Look for methods 'class_needed_<base>' in mfaktc.c. I can certainly...
Forum: GPU Computing 2019-11-03, 11:39
Replies: 32
Views: 24,599
Posted By MrRepunit
When I started the fork of mfaktc I was only...

When I started the fork of mfaktc I was only considering base 10 repunits, so I had to 'deoptimize' some code. I removed the Barrett kernels as they seemed unsuited to fit the base 10 and also more...
Forum: GPU Computing 2019-11-01, 21:54
Replies: 32
Views: 24,599
Posted By MrRepunit
Okay, so there seems to be pattern. Let's wait a...

Okay, so there seems to be pattern. Let's wait a bit, maybe we can isolate the issue with more feedback.
Forum: GPU Computing 2019-11-01, 20:30
Replies: 32
Views: 24,599
Posted By MrRepunit
What GPU do you use? On my own system (GeForce...

What GPU do you use? On my own system (GeForce GTX 1080, compute capability 6.1 & CUDA 10.1) it works without issues.
I know that a GTX 1660 was giving problems running the previous mfaktc-repunit...
Forum: GPU Computing 2019-11-01, 06:14
Replies: 3,506
Views: 439,081
Posted By MrRepunit
Introducing gr-mfaktc, a CUDA siever for generalized repunits

Hi all,
just want to announce here in this thread that I finished the generalized repunits version of mfaktc, the long wished for generalization of my base 10 repunits mfaktc variant.
It supports...
Forum: GPU Computing 2019-10-31, 22:30
Replies: 32
Views: 24,599
Posted By MrRepunit
gr-mfaktc: a CUDA program for generalized repunits prefactoring

Hi,
finally I completed the generalized repunit version of mfaktc.

Changes compared to mfaktc-0.21:
- implemented factoring of generalized repunits
- Removed Barrett and 72 bit kernels
-...
Forum: Software 2018-12-30, 19:17
Replies: 442
Views: 83,485
Posted By MrRepunit
I know, I was just hoping to be able to use the...

I know, I was just hoping to be able to use the json output which holds more information.


I did not follow the full thread, I should do it at some point. What I already asked if the Gerbicz...
Forum: Software 2018-12-29, 19:25
Replies: 442
Views: 83,485
Posted By MrRepunit
Perfect, thank you very much. When do you think...

Perfect, thank you very much.
When do you think the binary is available?
Forum: Software 2018-12-27, 20:24
Replies: 442
Views: 83,485
Posted By MrRepunit
Hi, I just noticed that the PRP test in...

Hi, I just noticed that the PRP test in prime95/mprime seems to be broken since version 29.4 (at least on Linux 64 Bit).
Test cases for the worktodo.txt (all should be prime):

PRP=1,10,19,-1,"9"...
Forum: GPU Computing 2018-09-14, 20:07
Replies: 3,506
Views: 439,081
Posted By MrRepunit
I try to do it this weekend, but I can only...

I try to do it this weekend, but I can only provide a linux executable quickly if I succeed. Windows will take a bit longer...
Forum: GPU Computing 2018-09-14, 19:59
Replies: 3,506
Views: 439,081
Posted By MrRepunit
I modified class_needed, 10 has to be...

I modified class_needed, 10 has to be exponentiated instead of 2, I added a 64 bit shortcut. I guess most of the 64 bit stuff can be used for mersenne numbers, but might need some changes or are...
Forum: GPU Computing 2018-09-14, 19:26
Replies: 3,506
Views: 439,081
Posted By MrRepunit
Not sure. I am not really fluent in this kind of...

Not sure. I am not really fluent in this kind of math (I am a theoretical physicist). My first thought was that we can use Legendre (n*p,p)=Legendre (0,p)*Legendre(n,p). Legendre (0,p) is trivially...
Forum: GPU Computing 2018-09-13, 19:05
Replies: 3,506
Views: 439,081
Posted By MrRepunit
I know, I have it from there. And I also follow...

I know, I have it from there. And I also follow the mfaktc thread for some years. I also suffered from the Cuda 8 bug myself. It was actually me that told TheJudger that the bug in Cuda 8 was fixed...
Forum: GPU Computing 2018-09-13, 18:52
Replies: 3,506
Views: 439,081
Posted By MrRepunit
I try to give you my derivation for base 10...

I try to give you my derivation for base 10 repunits:
Similar to Mersenne factors we find for repunits that


\text{Legendre}(10,p) \equiv 1 (10 is a quadratic residue mod p)...
Forum: GPU Computing 2018-09-13, 14:04
Replies: 3,506
Views: 439,081
Posted By MrRepunit
I really meant a source code repository, similar...

I really meant a source code repository, similar to gpuowl: https://github.com/preda/gpuowl
Showing results 1 to 25 of 93

 
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