Few questions

[Tumeez]

Allrighty.. First I hear today this project. I have many questions. Second I'm sorry for my bad english skill. Ask if you don't understand.

1. Can I use mfaktc and Prime95 together?

2. How I can set my computer calculating highest number?

3. I make some new "Manual testing Assigment". Now I have 15 different assigment, how I can delete all and make new?

4. How I can set my computer find new Mersenne prime number?

5. What is the differences between Trial Factoring, First LL Tests, LL Double-Checks, P-1 Factoring and ECM Factoring?

6. Which of those I have to choice and why?

7. What CPU's and GPU's is best to calculating or finding new prime number?

Thank you to all who helped me.

- Tumeez

[Uncwilly]

Originally Posted by Tumeez

1. Can I use mfaktc and Prime95 together?

They both can be running on the same machine, but you can not make them both work on the same number together.

2. How I can set my computer calculating highest number?

The highest number that Prime95 can handle would take a very long time to finish (more than a year). It is best to check your machine out with some smaller numbers first to make sure it is ok. Double Checks are good for this. It will compare your answer to someone else's to see if they match.

3. I make some new "Manual testing Assigment". Now I have 15 different assigment, how I can delete all and make new?

You can use "Unreserve Exponent" from the "Advanced" selection on the menu.

4. How I can set my computer find new Mersenne prime number?

There is no known way to select numbers that have much better chance at being the next new Mersenne Prime (other than the obvious requirement of having the exponent be prime.)

5. What is the differences between Trial Factoring, First LL Tests, LL Double-Checks, P-1 Factoring and ECM Factoring?

First I will suggest that you look at the Wiki here: http://www.mersennewiki.org/index.php/Worktype

The LL test are the only ones that can find a new prime.
Trial Factoring and P-1 help limit the number LL tests that are performed.

6. Which of those I have to choice and why?

Depends on what you like to do. If you have a graphics card that will support mfaktc, run that on it (it does TF work, which is the best type of work for a GPU). On the CPU LL and Double Checks are advised.

[Prime95]

Welcome to GIMPS!

[Tumeez]

Originally Posted by Uncwilly

You can use "Unreserve Exponent" from the "Advanced" selection on the menu.

Depends on what you like to do. If you have a graphics card that will support mfaktc, run that on it (it does TF work, which is the best type of work for a GPU). On the CPU LL and Double Checks are advised.

Okay.. But I do some assigment for manual to mkfaktc. I noticed that when mkfaktc count all added factors it's stopped. Then I make 999 new assigment. Did I do right?

My CPU is Intel Core i5 2500K @4GHz
My GPU is nVidia GeForce GTX680

Then I be worth use GPU?

That "Unreserve Exponent" is only include Prime95, If I use mkfaktc, how I can delete other assigments?

[Tumeez]

Originally Posted by Prime95

Welcome to GIMPS!

Thanks you :). This thing is intresting, first time I read it in Wikipedia, heh and now I help you :).

Can anyone say what CPU is best to calculating prime number?

[Uncwilly]

Originally Posted by Tumeez

Then I make 999 new assigment. Did I do right?

What range are the numbers for your assignment (they should be between 50,000,000 and 999,999,999)? Also, what is bit level that you are searching to (it should be a number number between 65 and 85)? These data should tell us how fast you can work through those 999 numbers.

My GPU is nVidia GeForce GTX680

Then I be worth use GPU?

About any GPU is much, much better than a very very fast CPU (for TF work.)
Here is how well your card works in relationship to others.
http://www.mersenne.ca/mfaktc.php?show=467&sort=ghdpd
Your CPU will produce about 16 GHz-days worth of work each 24 hours. Your GPU should produce almost 295 GHz-days worth of work per 24 hours (this is for TF work). So I would say it is worth it :)

That "Unreserve Exponent" is only include Prime95, If I use mkfaktc, how I can delete other assigments?

You may not need to, your machine may go through the numbers fast enough to get them all done soon.

I noticed that when mkfaktc count all added factors it's stopped.

When it finds a factor, it will stop testing the exponent. Finding the factor saves the need for a LL test. Once we have a factor we know 100% for sure that the number we tested is NOT prime.

Your CPU will be fine to run LL tests on. The easiest way is to set Prime95 to be automatic for the assignment type "What ever makes the most sense."
Currently all new LL test assignments being handed out are large enough that they would be a new world record. Your machine may be given some Double checks first to make sure it is reliable (even new machines can have problems.) Once it is proved reliable it will be given better assignments (first time LL tests). If it works well and meets the requirements here: http://www.mersenne.org/thresholds/ it might get some of the assignments that we want done soonest.

Can anyone say what CPU is best to calculating prime number?

The fastest Intel CPU with the most cores will usually be the "best" (the program can use the fastest code). But any modern CPU is good. If you are running in a 64 bit operating system, use the 64 bit version of Prime95 (it is faster).

Also, if testing 4 numbers at once on a 4 core machine will allow the machine to check more numbers (over time), compared to testing only 1 number at a time with all 4 cores.


Have fun!

[kladner]

Can anyone say what CPU is best to calculating prime number?

I have seen recommendation on the forum that the Intel i5 has good balance between performance and cost. The Haswell chips are also very power efficient.

Whatever you get, with Prime95 running on all cores, you are likely to need more CPU cooling than the stock cooler (which is often packaged with CPUs) can provide.

And, of course, with a CPU and GPU running at full capacity, your electric cost will increase, depending on how many hours a day they operate.

Welcome to the forum!

[VictordeHolland]

Welcome to GIMPS and the forum!

Please don't underestimate the cost of electricity of running a computer 24/7 . Of course it depends on where you live, but if running for a year it can easily surpass the cost of the hardware itself! So keep that in mind.
You'll not want to cancel your holiday because you got a fat electricity bill now do we? We don't want to be responsible for that ;).