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Search: Posts Made By: paulunderwood
Forum: Data 2022-12-07, 20:47
Replies: 594
Views: 131,278
Posted By paulunderwood
The certificate has been verified by factorDB....

The certificate has been verified by factorDB. Now https://www.mersenne.ca/prp.php needs to be updated.
Forum: PrimeNet 2022-12-04, 11:17
Replies: 2,691
Views: 361,344
Posted By paulunderwood
I have a file with an MD5sum mismatch, What's the...

I have a file with an MD5sum mismatch, What's the remedy?

Edit: The answer was to re-transfer the proof file across my sneakernet,
Forum: And now for something completely different 2022-12-04, 03:17
Replies: 219
Views: 24,811
Posted By paulunderwood
Thumbs up New working code

:pong:

(To install cm (ecpp-mpi) on Debian based systems follow EdH's instructions (https://mersenneforum.org/showpost.php?p=618844&postcount=1).)

After the instructions given here...
Forum: Software 2022-12-02, 21:26
Replies: 788
Views: 83,970
Posted By paulunderwood
Oh, okay. I did not read all, if any, of your...

Oh, okay. I did not read all, if any, of your original post. TL;DR thread. All the best!
Forum: Software 2022-12-02, 21:21
Replies: 788
Views: 83,970
Posted By paulunderwood
The answer might have been "to reduce electricity...

The answer might have been "to reduce electricity costs". HT/SMT uses more juice.
Forum: EdH 2022-12-02, 16:41
Replies: 24
Views: 781
Posted By paulunderwood
Great, EdH. Now can we have a post on how to run...

Great, EdH. Now can we have a post on how to run ecpp-mpi on more than one host?
Forum: Software 2022-12-02, 12:26
Replies: 788
Views: 83,970
Posted By paulunderwood
The Ryzen 3600 is a 6 core machine....

The Ryzen 3600 is a 6 core machine. Prime95/mprime is so well written in assembler that SMT/HT (hyperthreading) is practically useless. Run only 6 instances.

Why are you not running SMT?
Forum: And now for something completely different 2022-12-01, 23:40
Replies: 219
Views: 24,811
Posted By paulunderwood
Arrow tonelli beta

I found the bug in my code. Attached is beta code. I think I have "length" right at 2^17 characters. Sorry for the ugliness of the code -- sheesh, two functions when one would suffice. The kick-in...
Forum: Lounge 2022-12-01, 17:14
Replies: 6
Views: 350
Posted By paulunderwood
Thanks for the web.archive.org link, but there is...

Thanks for the web.archive.org link, but there is nothing like a live site with a database behind it, one which evolves hour by hour. I pray it stays alive after CC retires. Where else is there such...
Forum: Lounge 2022-12-01, 17:03
Replies: 6
Views: 350
Posted By paulunderwood
The day will come when CC will need to retire. I...

The day will come when CC will need to retire. I have been using, linking to and reading The Prime Pages for nearly 25 years, back when GIMPS had not yet found a mega-prime. I really hope some entity...
Forum: And now for something completely different 2022-11-30, 23:34
Replies: 202
Views: 44,624
Posted By paulunderwood
If you can write the code to save and read if...

If you can write the code to save and read if saved the primorial that would be great. It would speed up resumption, but the error I have been getting would still occur -- that is at Size [0].

I...
Forum: And now for something completely different 2022-11-30, 21:22
Replies: 202
Views: 44,624
Posted By paulunderwood
The primorial for R86453 takes O(700 core hrs) to...

The primorial for R86453 takes O(700 core hrs) to compute each time the computer resumes :ermm: So you see the efficiency of using the primorial is not necessarily a great thing.

Second test file...
Forum: And now for something completely different 2022-11-30, 19:26
Replies: 202
Views: 44,624
Posted By paulunderwood
The results of the tests are attached.

The results of the tests are attached.
Forum: And now for something completely different 2022-11-30, 19:05
Replies: 27
Views: 603
Posted By paulunderwood
No problem with the helping out. I must...

No problem with the helping out.

I must admit I did not set my ROCm library path with LD_LIBRARY_PATH, but merely copied the ".so" to /usr/lib64 :grin:
Forum: And now for something completely different 2022-11-30, 16:27
Replies: 27
Views: 603
Posted By paulunderwood
Did you export LD_LIBRARY_PATH? See this...

Did you export LD_LIBRARY_PATH? See this (https://iq.opengenus.org/set-ld-library-path/).
Forum: And now for something completely different 2022-11-30, 15:52
Replies: 27
Views: 603
Posted By paulunderwood
You might have to sudo make uninstall firstly....

You might have to sudo make uninstall firstly. Let us know how you get on with a fresh machine.
Forum: And now for something completely different 2022-11-30, 15:35
Replies: 27
Views: 603
Posted By paulunderwood
Yes. Later versions produce a primo file,...

Yes. Later versions produce a primo file, although you have rename it with a ".out" extension and chage it to "n=$...." inside the primo file, to get factoDB to accept it. There are scripts using sed...
Forum: And now for something completely different 2022-11-30, 15:11
Replies: 27
Views: 603
Posted By paulunderwood
The next question is: are you you using the same...

The next question is: are you you using the same version of cm? Here is what I am using:

ecpp -v
CM: include 0.4.1dev, lib 0.4.1dev
GMP:...
Forum: And now for something completely different 2022-11-30, 14:12
Replies: 27
Views: 603
Posted By paulunderwood
It might seem like a silly question: Are you...

It might seem like a silly question: Are you using the file flag -f ?
Forum: And now for something completely different 2022-11-30, 06:28
Replies: 219
Views: 24,811
Posted By paulunderwood
I have code that gets the right answer for GWNUM...

I have code that gets the right answer for GWNUM powm, but get an error "malloc(): corrupted top size". I have hit a brick wall. I use M4423 as a test number. Perhaps someone can debug it,

...
Forum: And now for something completely different 2022-11-30, 05:41
Replies: 27
Views: 603
Posted By paulunderwood
@EdH, did you get mpc from...

@EdH, did you get mpc from https://www.multiprecision.org/mpc/download.html ?

I installed the headers only through apt


apt list mpc ...
Forum: And now for something completely different 2022-11-29, 14:25
Replies: 219
Views: 24,811
Posted By paulunderwood
This is not trivial. Can b be negative in...

This is not trivial. Can b be negative in gmp_powm(r,b,e,n)?

I am finding it difficult to debug. If someone else want to have a crack at it then please go ahead.
Forum: And now for something completely different 2022-11-28, 22:27
Replies: 202
Views: 44,624
Posted By paulunderwood
There was no animosity intended. I was merely...

There was no animosity intended. I was merely conveying how much I admire Robert's work that is corn.c, and agreeing with him that the error is most likely with GMP's mpn/mu_div_qr.c somewhere. That...
Forum: And now for something completely different 2022-11-28, 20:55
Replies: 202
Views: 44,624
Posted By paulunderwood
Of course I am using your corn.c. I'd be a fool...

Of course I am using your corn.c. I'd be a fool not to utilize the huge speed up.

I had R86453 fail with this error...
Forum: And now for something completely different 2022-11-28, 19:16
Replies: 202
Views: 44,624
Posted By paulunderwood
https://primes.utm.edu/top20/page.php?id=67 was...

https://primes.utm.edu/top20/page.php?id=67 was used as a source, not OEIS.
Showing results 1 to 25 of 1000

 
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