Prime95 v30.3

[Prime95]

Originally Posted by Jwb52z

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!

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

To more directly answer your question, no speed increase.

[stippix]

Originally Posted by Prime95

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.

Hello,
Windows XP needs older compiler version VS-2017 ...
https://docs.microsoft.com/en-us/cpp...p?view=vs-2019
Greetings

[moebius]

Originally Posted by Prime95

Only if you count no longer having to do double-checking.To more directly answer your question, no speed increase.

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.

[James Heinrich]

Originally Posted by Prime95

Only if you count no longer having to do double-checking. To more directly answer your question, no speed increase.

For identical worktypes 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 Jwb52z (and myself) who like to do P-1, there is some slightly optimized bounds selection improvments in v30.

[Uncwilly]

Originally Posted by moebius

[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

George put a note on Mersenne.org. That is where the average user is likely to see it.

[kriesel]

Originally Posted by James Heinrich

For identical worktypes 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 Jwb52z (and myself) who like to do P-1, there is some slightly optimized bounds selection improvments in v30.

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.

[storm5510]

Originally Posted by axn

I'm guessing mprime doesn't have "execute" permission. I'm also guessing mprime's owner is not your login account.

If you do ls -l and paste it here, we can confirm.

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

Thank you all for your replies.

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.

sudo chmod +x mprime
sudo chmod +rw on worktodo.txt and results.txt.
sudo chmod +r on the libraries.

I used ls -l after every change to verify that is was correct. Afterwards ./mprime and everything worked properly.

I found a good reference site here.

[axn]

Originally Posted by storm5510

Afterwards ./mprime and everything worked properly.

[storm5510]

Originally Posted by axn

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

[Mark Rose]

Originally Posted by storm5510

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

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

[Prime95]

mprime does not use https