OFFICIAL "SERVER PROBLEMS" THREAD

[Madpoo]

Originally Posted by slandrum

There's a problem with the 103M range: there are two assignments available that are never being assigned.

I don't know why they're still unassigned. They seem to be available on the server, but perhaps no qualified cat-0 machine is getting them?

The exponents are:
103313627
103785107

[Uncwilly]

Why not give them to some known person and manually set their assignment in the server. kriesel could knock them out in short order. 'Assign' them to George or yourself and let a heavy hitter do the actual work.

[Prime95]

Originally Posted by Madpoo

I don't know why they're still unassigned. They seem to be available on the server, but perhaps no qualified cat-0 machine is getting them?

The exponents are:
103313627
103785107

Very weird. They are now available.

[Raydex]

Originally Posted by Prime95

Very weird. They are now available.

"Available" means the same thing as "unassigned" here. Because they are unassigned, they are available as assignments for someone's Prime95 to register it to the server.

[Prime95]

Originally Posted by Raydex

"Available" means the same thing as "unassigned" here. Because they are unassigned, they are available as assignments for someone's Prime95 to register it to the server.

It gets weirder. The server gave one out as P-1 and one as PRP (to Ben Delo). Keep an eye on them to make sure they don't get stuck again.

[slandrum]

Originally Posted by Prime95

It gets weirder. The server gave one out as P-1 and one as PRP (to Ben Delo). Keep an eye on them to make sure they don't get stuck again.

They've both been PRP checked now.

[drkirkby]

Originally Posted by slandrum

There's a problem with the 103M range: there are two assignments available that are never being assigned.

You later wrote they were 103313627 and 103785107, which have now been done. But how did you discover those two unassigned exponents? I am aware of the link to find assigned exponents in the 103,000,000 to 104,000,000 range
https://www.mersenne.org/assignments...p_hi=104000000
(currently only 9 of them), but are unaware of any reasonably fast way of finding unassigned exponents in a particular range.

[drkirkby]

The server is still issuing PRP test assignments with an entry in worktodo.txt that indicates 2 tests will be saved. For example, one of my entries is
PRP=xxxxxxx,1,2,104760107,-1,76,2,3,1
which, if my understanding is correct, will result in the P-1 test taking longer than the optimal amount. That was issued 4 days ago as a category 1 exponent.
If my understanding is correct, this would only seem appropriate if the computer doesn’t have the resources to generate and upload the proof file, or someone has configured their software not to upload a proof. I am using a recent version of mprime (IIRC 30.6b4), and are generating and uploading proof files.

[Viliam Furik]

Originally Posted by drkirkby

You later wrote they were 103313627 and 103785107, which have now been done. But how did you discover those two unassigned exponents? I am aware of the link to find assigned exponents in the 103,000,000 to 104,000,000 range
https://www.mersenne.org/assignments...p_hi=104000000
(currently only 9 of them), but are unaware of any reasonably fast way of finding unassigned exponents in a particular range.

If you mean Aaron (user Madpoo), he's basically a magician - he's in charge of the PrimeNet server. Therefore it's easy for him to make a direct search in the database. But even a regular PrimeNet user can do it, by carefully looking through detailed exponent status for the exponent range 103M - 104M. With enough time on your hands, you can check which exponents are not assigned. 54206 exponents are not that much, considering most of them are factored...

[kriesel]

Originally Posted by drkirkby

The server is still issuing PRP test assignments with an entry in worktodo.txt that indicates 2 tests will be saved.
...

If my understanding is correct, this would only seem appropriate if the computer doesn’t have the resources to generate and upload the proof file, or someone has configured their software not to upload a proof. I am using a recent version of mprime (IIRC 30.6b4), and are generating and uploading proof files.

Yes, this is known behavior, and may be by design.
The value 2 is an approximation. There are several cases.

• PRP with proof: needs a cert. Proof power typically 7 or higher, and failure rate is small but nonzero. So 1.00n. We hope this is the most common case, for efficiency and reliability.

• PRP no proof; will need a PRP DC. PRP TC rate is in the PPM range. So 2.0000n. (There are older OSes/systems that can't run the proof-capable prime95 versions. Mlucas doesn't have proof-capable PRP released yet. Systems might lack the necessary disk space or be configured in prime95/mprime with too little space usage allowed.)

• LL; will need an LL DC. (Yes, LL first test are no longer being issued by PrimeNet API, but there are some folks that may be converting PRP assignments to LL. Or obtaining them manually. Or running them without assignments. Or reporting in already-assigned work after a long slow run. Maybe run on an old slow GPU or CPU/OS that can't run Gpuowl or PRP-capable mprime/prime95 respectively.) Error rate 1-2% per run for wavefront exponents means ~2.02-2.04 per exponent. (And much higher error rate with higher exponent means higher numbers of tests saved. The sparse data for 100Mdigit and higher is consistent with error rate about proportional to run time, ~p^2.1, so at 100Mdigit, ~2.5; 300Mdigit, ~17.)

For PrimeNet API connected mprime/prime95, the server may have the necessary info for the PRP first test assigned system to determine PRP proof capability and so choose and specify 1 not 2 tests saved. If there's an error of any sort in the first PRP test and proof generation that's unrecoverable, it can't predict ahead of time that a second test will or won't be needed, or whether the second will be performed by a PRP proof capable installation. I think that's covered by the 1.00n.

[Uncwilly]

Originally Posted by Viliam Furik

But even a regular PrimeNet user can do it, by carefully looking through detailed exponent status for the exponent range 103M - 104M. With enough time on your hands,

Or if you can program. It is not that hard to compare 2 lists and find items that don't match.