mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.69 seconds.
Search: Posts Made By: Prime95
Forum: Software 2020-07-13, 21:10
Replies: 546
Views: 69,415
Posted By Prime95
FYI: The mysterious "Error writing intermediate...

FYI: The mysterious "Error writing intermediate file" bug during a PRP test has been found and fixed in version 30.1. The bug is is fairly harmless and happens about 1 in every 1000 save file...
Forum: PrimeNet 2020-07-13, 20:43
Replies: 1,891
Views: 132,717
Posted By Prime95
I'm not wise in the way of managing a Windows...

I'm not wise in the way of managing a Windows Server. But Aaron seems to be offline, so I've tried restarting the SQLServer service. Fingers crossed, the problems will go away.
Forum: PrimeNet 2020-07-13, 06:18
Replies: 1,891
Views: 132,717
Posted By Prime95
I have not had any problems the last several...

I have not had any problems the last several hours.

The server error log is reporting many 300 second timeouts, but it happens in bursts. No problems for an hour, then a few dozen timeouts.
...
Forum: PrimeNet 2020-07-13, 01:04
Replies: 1,891
Views: 132,717
Posted By Prime95
OK, not as bad as first thought... TF...

OK, not as bad as first thought... TF assignments below 99xxxxxx that had an unverified first-time LL/PRP test got axed (in other words exponents that need a DC).
Forum: PrimeNet 2020-07-12, 23:19
Replies: 1,891
Views: 132,717
Posted By Prime95
And this is why I hate to intervene.... I...

And this is why I hate to intervene....

I have accidentally deleted all TF assignments from 52561800 to 99642815
Forum: Lounge 2020-07-12, 01:43
Replies: 17
Views: 321
Posted By Prime95
The two happiest days in a boat owner's life: ...

The two happiest days in a boat owner's life:

1) The day they buy the boat
2) The day they sell the boat.
Forum: News 2020-07-06, 16:18
Replies: 99
Views: 3,884
Posted By Prime95
We've just started brainstorming how to upload...

We've just started brainstorming how to upload these files. Be prepared to archive your proofs locally for quite a while.

I'll roll out a proof-enabled mprime to my local machines later this week.
Forum: News 2020-07-05, 06:32
Replies: 99
Views: 3,884
Posted By Prime95
Certifying proof for M97898863. Proof power = 8,...

Certifying proof for M97898863. Proof power = 8, TopK = 97899008, hash length = 64
Prover did 145 excess squarings
Certifying a negative PRP test
Root hash =...
Forum: News 2020-07-04, 20:44
Replies: 99
Views: 3,884
Posted By Prime95
The last details were ironed out by email. ...

The last details were ironed out by email. Mihai started a wiki at gpuowl that we should update.
Forum: News 2020-07-04, 20:43
Replies: 99
Views: 3,884
Posted By Prime95
I think Prime95 will default to allocating the...

I think Prime95 will default to allocating the disk space upfront so that the test does not get 89% complete and run into a disk full error. Better to get a disk full error upfront and drop the...
Forum: News 2020-07-04, 03:30
Replies: 99
Views: 3,884
Posted By Prime95
I understand. My "dream machine" builds of 5...

I understand. My "dream machine" builds of 5 years ago have 32GB disks feeding 5 (formerly 7) CPUs.
Forum: News 2020-07-04, 03:10
Replies: 99
Views: 3,884
Posted By Prime95
Prime95 can now generate proofs. Can't upload...

Prime95 can now generate proofs. Can't upload them or verify them, but it is a start.

Some interesting data and a decision to be made.

For a 100Mbit number, the optimal proof power is 10. ...
Forum: GpuOwl 2020-06-27, 16:59
Replies: 3
Views: 195
Posted By Prime95
I "tidied up" the code by remove pragmas that...

I "tidied up" the code by remove pragmas that told the compiler that gpuowl requires 64-bit base and extended atomics. In fact the 64-bit base atomics are used in one place. The AMD OpenCL didn't...
Forum: Math 2020-06-24, 20:02
Replies: 195
Views: 7,936
Posted By Prime95
In choosing the hash function, we are really...

In choosing the hash function, we are really guarding against a researcher discovering a weakness in the system that is not presently known.

If the future weakness is a reduction in brute force...
Forum: Math 2020-06-24, 19:48
Replies: 195
Views: 7,936
Posted By Prime95
Some data (now using the attached sliding window...

Some data (now using the attached sliding window exponentiation routine)

Proof level 8:
Proof generator does 15489 or 20632 squarings (48-bit vs 64-bit hash)
Server does 1080 or 1414 squarings...
Forum: News 2020-06-23, 23:03
Replies: 99
Views: 3,884
Posted By Prime95
Indeed. Pavel Atnashev has improved our...

Indeed.

Pavel Atnashev has improved our original concept of the workflow (see post 46 (https://mersenneforum.org/showpost.php?p=548565&postcount=46)). We think the Primenet Server can handle...
Forum: Math 2020-06-23, 03:01
Replies: 195
Views: 7,936
Posted By Prime95
Silly me. The code did not work for 64-bit ints....

Silly me. The code did not work for 64-bit ints.



We're not talking about the hash values. This is the A[N]^random value sent to the user to run topK/(2^N) squarings. The user's result is...
Forum: Math 2020-06-23, 01:12
Replies: 195
Views: 7,936
Posted By Prime95
I changed my random exponent to a prime number...

I changed my random exponent to a prime number between 33 and 48 bits. Stole some Rosetta C code for Miller-Rabin test.
Forum: Math 2020-06-23, 01:09
Replies: 195
Views: 7,936
Posted By Prime95
Residues are written to disk as the PRP test...

Residues are written to disk as the PRP test progresses. At test end, the residues are read from disk - only one in memory at a time - to produce the proof.

I took "grouped" to mean that we do...
Forum: Math 2020-06-22, 15:53
Replies: 195
Views: 7,936
Posted By Prime95
They are grouped. A very simple recursive...

They are grouped. A very simple recursive routine does the trick.
Forum: Math 2020-06-22, 09:11
Replies: 195
Views: 7,936
Posted By Prime95
This is easier to code than I expected! I just...

This is easier to code than I expected! I just created a power=8 proof of M216091 and successfully verified it.

Using 48-bit hashes, the proof construction cost was the equivalent of 15K...
Forum: Information & Answers 2020-06-21, 19:27
Replies: 18
Views: 672
Posted By Prime95
LOL, guilty. Mlucas FFTs are written...

LOL, guilty.



Mlucas FFTs are written in C, Prime95 in assembly. Try looking in the Mlucas subforum as Ernst has often benchmarked Mlucas against Prime95. Prime95 is not twice as fast as...
Forum: News 2020-06-21, 05:31
Replies: 99
Views: 3,884
Posted By Prime95
You understand correctly.

You understand correctly.
Forum: PrimeNet 2020-06-21, 01:57
Replies: 3
Views: 128
Posted By Prime95
A simple solution might be to use one user ID. ...

A simple solution might be to use one user ID. You can distribute that ID without the password and everyone will be able to get work and report results. Each user can create unique computer names...
Forum: GpuOwl 2020-06-20, 21:46
Replies: 2,360
Views: 130,284
Posted By Prime95
You need to rerun this. This time make sure that...

You need to rerun this. This time make sure that the still-running 5.5M job's timings do not change during each of the above tests. I've often seen nutty timings. Just yesterday, one of my 5M FFTs...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 22:33.

Mon Jul 13 22:33:41 UTC 2020 up 110 days, 20:06, 0 users, load averages: 1.87, 2.12, 2.00

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.