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Old 2021-03-26, 21:13   #1
FlaJunkie
 
Mar 2021

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Default Default processing screen explanation

Forum newbie here but used Prime95 a decade ago...

Is there an explanation of the Communications thread screen and the Worker #1-6 screen?

I would like to understand what the program is doing when it pops up those cryptic sentences.
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Old 2021-03-26, 22:49   #2
kruoli
 
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Each of these screens will give you a lot of messages. Do you have some lines where you are particulary interested in what they mean? In general, the communication thread will show you what is being exchanged with PrimeNet, the worker threads will report on everything that is currently being worked on (on your machine).

Hearing a worker count of 6, there might be room for improvement in terms of computation efficiency, but that'll be something for another post. First, you've had a question.

Last fiddled with by kruoli on 2021-03-26 at 22:51 Reason: Rephrasing.
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Old 2021-03-27, 12:50   #3
MattcAnderson
 
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Welcome to MersenneForrum.org forum !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 2021-03-28, 02:21   #4
FlaJunkie
 
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Quote:
Originally Posted by kruoli View Post
Each of these screens will give you a lot of messages. Do you have some lines where you are particularly interested in what they mean? In general, the communication thread will show you what is being exchanged with PrimeNet, the worker threads will report on everything that is currently being worked on (on your machine).

Hearing a worker count of 6, there might be room for improvement in terms of computation efficiency, but that'll be something for another post. First, you've had a question.
Here's a screenshot. Is this testing my computer or is it working on a new prime?
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Old 2021-03-28, 02:22   #5
FlaJunkie
 
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Welcome to MersenneForrum.org forum !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thanks! All of these numbers are making my head ache!
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Old 2021-03-28, 03:33   #6
Uncwilly
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Quote:
Originally Posted by FlaJunkie View Post
Here's a screenshot. Is this testing my computer or is it working on a new prime?
You are testing a 110607703 to see if it is prime or not. Previously your machine tried to find a factor by using P-1 factoring. It did not find a factor. Right now it is doing a PRP test. We are using those instead of LL tests for our first time tests. That is because there is superior error checking that is available and we can eliminate the need for double checks.
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Old 2021-03-28, 13:49   #7
FlaJunkie
 
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Quote:
Originally Posted by Uncwilly View Post
You are testing a 110607703 to see if it is prime or not. Previously your machine tried to find a factor by using P-1 factoring. It did not find a factor. Right now it is doing a PRP test. We are using those instead of LL tests for our first-time tests. That is because there is superior error checking that is available and we can eliminate the need for double checks.
Thanks for the link and the explanation.

So my machine is factoring a potentially new Mersenne Prime over 100 million digits? I am not testing an old result nor is the program testing my machine before it assigns real work?

I need more coffee...
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Old 2021-03-28, 14:01   #8
FlaJunkie
 
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Quote:
Originally Posted by Uncwilly View Post
You are testing a 110607703 to see if it is prime or not...Right now it is doing a PRP test...
Is this table applicable to the work I am doing?

https://www.mersenne.org/thresholds/
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Old 2021-03-28, 14:13   #9
Uncwilly
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Quote:
Originally Posted by FlaJunkie View Post
So my machine is factoring a potentially new Mersenne Prime over 100 million digits? I am not testing an old result nor is the program testing my machine before it assigns real work?
Your machine is doing real work. It is not doing factoring. It did some that was needed on that exponent before starting the PRP test. The PRP test can prove a number is not prime, without searching for factors. The number you are testing is not 100 million decimal digits long. It is just under 33.3 million decimal digits.

The PRP test with the superior GEC form of error checking will find any errors in your machine and will report them if they are severe enough, or fix them. This is why PRP was added to the mix in 2019? for first time tests. Then another development made the elimination of double checks possible (without an error sneaking trough). So, PRP (using version 30, or above, of Prime95) became the preferred test for first time tests.
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Old 2021-03-28, 14:23   #10
FlaJunkie
 
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Quote:
Originally Posted by Uncwilly View Post
Your machine is doing real work.
Cool.

The link you shared has a ton of data linked to it about that exponent. I'll have to study it.

I have a math minor from my old, I say OLD college days. Right now, it's about as helpful a chocolate teapot. I'll keep learning; thanks for your help.

One more question: If I were to take my last computer (pretty fast Intel i7 with OC capability) and reformat the drive to load an operating system solely dedicated to running Prime95, what would you suggest? Is there a thread here describing the optimal home set up for that purpose?


Last fiddled with by Uncwilly on 2021-03-28 at 14:57 Reason: Made family friendly
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Old 2021-03-28, 15:01   #11
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Quote:
Originally Posted by FlaJunkie View Post
If I were to take my last computer (pretty fast Intel i7 with OC capability) and reformat the drive to load an operating system solely dedicated to running Prime95, what would you suggest?
First off: I edited your post to keep it in line with the family friend ethos that we try to keep most of the forum (the soapbox less so).

Many users here would recommend a light form of Linux. Other folks will likely speak up for their favourite. My interactions with Linux are limited.
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