[QUOTE=Jwb52z;556923]I hope this question is ok because I didn't have time to read all of the current 26 pages. Is there a speed increase at all from version 29.8 build 5? Thank you in advance![/QUOTE]

Only if you count no longer having to do double-checking.

To more directly answer your question, no speed increase.

[QUOTE=Prime95;556909]A quick scan of VS2019 documentation shows no easy or obvious solution. I don't intend to work on this any more. As you can imagine 15 year old 32-bit OSes are not a high priority, but I do appreciate the test. We at least found and fixed a bug for the remaining one or two Vista users.[/QUOTE]

Hello,
Windows XP needs older compiler version VS-2017 ...
[url]https://docs.microsoft.com/en-us/cpp/build/configuring-programs-for-windows-xp?view=vs-2019[/url]
Greetings

[QUOTE=Prime95;556925]Only if you count no longer having to do double-checking.To more directly answer your question, no speed increase.[/QUOTE]
Somehow I have the feeling, that most of the normal (smaller) primenet users (like me) do not even know about the changes regarding PRP / CERTS, because they are required to read the forum for this purpose. I'm just wondering who will later do all of these PRP-DC's of the 92-110M exponents who currently come in. The CPU'S / GPU'S / RAM unfortunately won't be faster by a factor of 10 every year.

[QUOTE=Prime95;556925]Only if you count no longer having to do double-checking. To more directly answer your question, no speed increase.[/QUOTE]For [u]identical worktypes[/u] there is no speed increase. But by eliminating double-checks the overall GIMPS throughput is, while not quite double, it's maybe 70%(?) increased. But only when we get the bulk of users moved to v30 from v29 and older.

And for users like [i]Jwb52z[/i] (and myself) who like to do P-1, there is some slightly optimized bounds selection improvments in v30.

[QUOTE=moebius;556930][I][B]Somehow I have the feeling, that most of the normal (smaller) primenet users (like me) do not even know about the changes regarding PRP / CERTS, because they are required to read the forum for this purpose[/QUOTE]
George put a note on Mersenne.org. That is where the average user is likely to see it.

[QUOTE=James Heinrich;556933]For [U]identical worktypes[/U] there is no speed increase. But by eliminating double-checks the overall GIMPS throughput is, while not quite double, it's maybe 70%(?) increased. But only when we get the bulk of users moved to v30 from v29 and older.

And for users like [I]Jwb52z[/I] (and myself) who like to do P-1, there is some slightly optimized bounds selection improvments in v30.[/QUOTE]
A rough estimate of traditional is:
2% TF
2% P-1
100% LL or PRP
100% LL or PRP DC
4% LL TC x 1/3 of exponents ~1.3%
total ~205% of a primality test per exponent

A rough estimate of new is (before adjustment downward of factoring effort to match reduced primality test effort)
2% TF
2% P-1
100% PRP
1% proof generation and verification assuming proof power 8
total ~105%

A rough estimate of reoptimized factoring effort reflecting reduced primality testing is 103% total.

So, about 2:1 effort reduction per exponent.

And the bonus of verification in hours, not years.

PRP/GEC shows up unreliable kit immediately, not up to 9 years later as in LL DC TC.

[QUOTE=axn;556867]I'm guessing [C]mprime[/C] doesn't have "execute" permission. I'm also guessing mprime's owner is not your login account.

If you do [C]ls -l[/C] and paste it here, we can confirm.

Use [C]sudo chown[/C] to change the ownership of the files in that folder. And [C]chmod[/C] to set the execute bit for [C]mprime[/C][/QUOTE]

[U]Thank you all for your replies.[/U]

I don't use it often enough to remember how, and I need to change that. I did some web searching, which I should have been before coming here.

[QUOTE]sudo chmod +x mprime
sudo chmod +rw on worktodo.txt and results.txt.
sudo chmod +r on the libraries.
[/QUOTE] I used [C]ls -l[/C] after every change to verify that is was correct. Afterwards [C]./mprime[/C] and everything worked properly.

I found a good reference site [URL="https://ss64.com/"]here[/URL]. :smile:

[QUOTE=storm5510;556946]Afterwards [C]./mprime[/C] and everything worked properly.[/QUOTE]

:tu:

[QUOTE=axn;556952]:tu:[/QUOTE]


I still have to use [C]sudo[/C]. If I don't, I get messages about some type of missing certificate. However, mprime will continue to run. Still learning. :smile:

[QUOTE=storm5510;556954]I still have to use [C]sudo[/C]. If I don't, I get messages about some type of missing certificate. However, mprime will continue to run. Still learning. :smile:[/QUOTE]

Could be that you're running a very out of date OS without updated TLS certificates used in the HTTPS connection to mersenne.org?

mprime does not use https