I forgot: How do I reserve a 100M digit Mersenne number?

[dcheuk]

Originally Posted by ET_

Once you manually reserve a 100M digits exponent, one should first do TF and P-1 on it.

Any advice on how far we should do TF on it?

Originally Posted by ET_

My question: how do you send TF and P-1 results to the server keeping your PRP reservation still active?

I reserved it first then manually submit TF results to the server, like this:
https://www.mersenne.org/report_expo...3898333&full=1

[kriesel]

Originally Posted by dcheuk

Any advice on how far we should do TF on it?

I reserved it first then manually submit TF results to the server, like this:
https://www.mersenne.org/report_expo...3898333&full=1

Enough to meet or exceed the primenet or gputo72 figures on mersenne.ca for the exponent. From that link, click the exponent under Mn to get to https://www.mersenne.ca/exponent/333898333. Mersenne.ca syncs with mersenne.org overnight so the tf to 80 isn't there yet. General rule of thumb, 4 bits higher than primenet tf limit, if you have a gpu to do tf; primenet limit if you only have CPU. The P-1 bounds will be adjusted in consideration of whatever the prior TF was, as indicated in the worktodo entry. One can gamble and run TF and P-1 in parallel on different devices. Over the long run it's better to do them sequentially.

[ATH]

Originally Posted by kriesel

Sometimes after passing both those checks, a manual reservation will still fail, with error 40, no available assignment. I have seen numerous occurrences of that, but don't recall whether some were in the 100Mdigit range. That's why I recommend getting a manual reservation with AID. If you've got that, you're good to go. Works anywhere in the mersenne.org exponent range. I think if a block is reserved by gputo72, it does not show up as reserved on the exponent listings.

Why does he need to use manual reservation if he uses Prime95 ? Prime95 will do that if the exponent is not reserved, if he just enters the PRP line in worktodo.txt. I think we are confusing him more than helping him.

[dcheuk]

Originally Posted by kriesel

Enough to meet or exceed the primenet or gputo72 figures on mersenne.ca for the exponent. From that link, click the exponent under Mn to get to https://www.mersenne.ca/exponent/333898333. Mersenne.ca syncs with mersenne.org overnight so the tf to 80 isn't there yet. General rule of thumb, 4 bits higher than primenet tf limit, if you have a gpu to do tf; primenet limit if you only have CPU. The P-1 bounds will be adjusted in consideration of whatever the prior TF was, as indicated in the worktodo entry. One can gamble and run TF and P-1 in parallel on different devices. Over the long run it's better to do them sequentially.

Okay thanks for the info. I'm going to proceed and run TF on this exponent on 2^80-81 then. It's 731ghz/days lol.

After I'm done I'll submit the result and wait for mersenne.ca to update the p-1 bounds to run p1 lucas.

Probably gonna take like 3-4 months for the prime test if no factors are found.

[kriesel]

Originally Posted by dcheuk

and wait for mersenne.ca to update the p-1 bounds to run p1 lucas.

No need to wait. The proper bounds are determined by the client software based on the worktodo entry, in prime95/mprime or CUDAPm1; they don't do any lookup of P-1 bounds on any server. (But if you were running P-1 in GpuOwL, you'd need to look at the bounds on mersenne.ca, or have a guide for what to pick. GpuOwl's default bounds I would not rely on.)

[kriesel]

Originally Posted by ATH

Why does he need to use manual reservation if he uses Prime95 ? Prime95 will do that if the exponent is not reserved, if he just enters the PRP line in worktodo.txt. I think we are confusing him more than helping him.

Maybe he doesn't need to, IF the exponent he enters is available. But it's a way to confirm the exponent is indeed AVAILABLE for assignment. The proof is in actually obtaining an assignment. Anyone running CUDALucas must obtain assignments manually, because there's no primenet interface, and no maintained reserve/submit auxiliary program. FYI, dcheuk also runs gpus on GIMPS tasks.

[JuanTutors]

Originally Posted by ATH

Why does he need to use manual reservation if he uses Prime95 ? Prime95 will do that if the exponent is not reserved, if he just enters the PRP line in worktodo.txt. I think we are confusing him more than helping him.

I did get more confused :-) So, I have WorkPreference=153. I set number of days to 90. I got assigned a 100M digit mersenne in the M332000000 range. Is there anything I need to do now? Thanks for the help! It's been a LOONG TIME since I've been back. We weren't even doing PRP tests back then. I think it was in the v25.4 era.

[kriesel]

Originally Posted by dominicanpapi82

I set number of days to 90. I got assigned a 100M digit mersenne in the M332000000 range.

Number of days? Do you mean "days of work to queue up", under options, preferences in prime95? If so, 90 days seems very excessive to me; 1-3 is plenty if you have reliable internet; it's how many days before the completion of one exponent that it will go get more work automatically. An assignment could expire before it begins if the number is very large there and the Category of the assignment is low. See https://www.mersenne.org/thresholds/

[JuanTutors]

Originally Posted by kriesel

Number of days? Do you mean "days of work to queue up", under options, preferences in prime95? If so, 90 days seems very excessive to me; 1-3 is plenty if you have reliable internet; it's how many days before the completion of one exponent that it will go get more work automatically. An assignment could expire before it begins if the number is very large there and the Category of the assignment is low. See https://www.mersenne.org/thresholds/

Ooh that threshold setting is finally done! I set it back down to 3 days so that I don't get in the penalty box. But besides setting the time back to 3 days, is there anything else I need to do to keep the 100M exponent that is already queued up.

[dcheuk]

Originally Posted by kriesel

Number of days? Do you mean "days of work to queue up", under options, preferences in prime95? If so, 90 days seems very excessive to me; 1-3 is plenty if you have reliable internet; it's how many days before the completion of one exponent that it will go get more work automatically. An assignment could expire before it begins if the number is very large there and the Category of the assignment is low. See https://www.mersenne.org/thresholds/

Yes sorry I didn't know what I was typing lol.

So I ran cudapm1 with this line (in worktodo.txt):

PFactor=1,2,333898333,-1,81,2

It just finished running stage 1 after a day but the program auto exits (or maybe it crashes) when stage 2 begins, immediately after the message printed on the screen:

Using up to 6560M GPU memory.
Selected B1=3130000, B2=71207500, 3.82% chance of finding a factor 
Using B1 = 3130000 from savefile. 
Continuing stage 2 from a partial result of M333898333 fft length = 20480K 
Starting stage 2. 
Using b1 = 3130000, b2 = 71207500, d = 2310, e = 12, nrp = 21
(program auto exists after this line ...)

Any help would be appreciated ...

[ATH]

Originally Posted by dominicanpapi82

I did get more confused :-) So, I have WorkPreference=153. I set number of days to 90. I got assigned a 100M digit mersenne in the M332000000 range. Is there anything I need to do now? Thanks for the help! It's been a LOONG TIME since I've been back. We weren't even doing PRP tests back then. I think it was in the v25.4 era.

You do not really need to do anything else, but since the test will probably take a very long time, you should check how far it has been factored, so you do not spend many months PRP testing it, while a factor could have been found in hours or days.

If you want I can trial factor it a bit on the GPU, you can PM me the exponent, it is up to you.