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Search: Posts Made By: axn
Forum: PrimeNet 2021-05-18, 17:33
Replies: 508
Views: 61,627
Posted By axn
Wow! Just, wow.

Wow! Just, wow.
Forum: Hardware 2021-05-17, 17:28
Replies: 5
Views: 141
Posted By axn
Ok. If you're running only one test using all 4...

Ok. If you're running only one test using all 4 cores, it is too slow even now.


Yuck. 12 is such a bad config. Either 8 or 16 would be better. Can you run CPU-Z and find out how many sticks and...
Forum: Hardware 2021-05-17, 16:33
Replies: 5
Views: 141
Posted By axn
Is this using all 4 cores or 1 core per worker?...

Is this using all 4 cores or 1 core per worker? How many workers? If you're running 1 worker with all 4 cores, neither time is particularly fast.

What is the clock speed the CPU is running at?
...
Forum: Lone Mersenne Hunters 2021-05-17, 08:56
Replies: 1,860
Views: 224,999
Posted By axn
Nice!

Nice!
Forum: Data 2021-05-15, 14:14
Replies: 457
Views: 68,364
Posted By axn
You can further drop power usage by limiting max...

You can further drop power usage by limiting max clock speed

For my 1660 Ti, I've set power limit to 70w. However, I'm running it with graphics clock capped at 1300 MHz, dropping the power to 44w...
Forum: Data 2021-05-15, 03:03
Replies: 457
Views: 68,364
Posted By axn
You're getting about 2800+ so, yes, it should...

You're getting about 2800+ so, yes, it should finish faster


Typically, you should be able to substantially decrease power usage with only a modest decrease in performance by setting max clock /...
Forum: Data 2021-05-14, 14:20
Replies: 457
Views: 68,364
Posted By axn
There are 2043 numbers in that range. TF from...

There are 2043 numbers in that range. TF from 74-75 takes about 90 GHd, so you should be able to complete the range in 10-11 weeks.

Based on prior P-1 done, you should find a factor every 115...
Forum: Data 2021-05-14, 04:46
Replies: 457
Views: 68,364
Posted By axn
In the last 365 days, 10M -1,677 20M -2,326 ...

In the last 365 days,
10M -1,677
20M -2,326
We need respectively 10k/8k more in those ranges (at all resolutions, 10M, 1M and 0.1M)
Forum: Data 2021-05-11, 11:17
Replies: 100
Views: 3,429
Posted By axn
No, that's not how this works. I try to explain...

No, that's not how this works. I try to explain it here (https://www.mersenneforum.org/showthread.php?p=576849#post576849), but basically, a "run" is not P+1 or P-1 per se, but rather, for a specific...
Forum: Data 2021-05-11, 11:11
Replies: 100
Views: 3,429
Posted By axn
The 6/5 seed would also have found this factor...

The 6/5 seed would also have found this factor (as a true P+1) if the B1 were ever-so-slightly bigger!!
Forum: And now for something completely different 2021-05-09, 06:59
Replies: 60
Views: 3,240
Posted By axn
Based on the clues, I have narrowed it down to: ...

Based on the clues, I have narrowed it down to:
8172707
8177207
8267747
8272787
8367707
8373377
8373767
8549777
8674727
Forum: Software 2021-05-07, 11:56
Replies: 5
Views: 156
Posted By axn
That's the best we can do; we will never get the...

That's the best we can do; we will never get the efficiency of running entirely from L3 cache.

Just so there is no confusion, there is difference between dual rank and dual channel. If you run...
Forum: Software 2021-05-07, 11:32
Replies: 5
Views: 156
Posted By axn
I am assuming that you were doing a single WU...

I am assuming that you were doing a single WU using all 8 cores.

5800X has a 32MB L3 cache. a 3200K FFT takes 3200*1024*8 bytes or 25MB. That will fit within the 32MB L3.

Clearly the 6M FFT,...
Forum: Software 2021-05-07, 09:03
Replies: 13
Views: 511
Posted By axn
Apples and oranges. More RAM wasn't the only...

Apples and oranges. More RAM wasn't the only variable in your test. The P-1 alogrithm also changed drastically between versions. Do comparisons with the same version only.



It is possible. Only...
Forum: Data 2021-05-06, 11:24
Replies: 457
Views: 68,364
Posted By axn
Thumbs up Stick a fork in it, 'cause ...

... 3.4 is done.

Got some help from ECM as the range is now being worked in GIMPS.

Once I'm done with the current batch of P-1 (another 6 days), I'll be moving on to 3.7
Forum: PrimeNet 2021-05-06, 02:16
Replies: 15
Views: 517
Posted By axn
30.3 >= 30.4 ?

30.3 >= 30.4 ?
Forum: PrimeNet 2021-05-05, 17:45
Replies: 15
Views: 517
Posted By axn
You should upgrade your client to version >= 30.4...

You should upgrade your client to version >= 30.4 (latest is 30.6), as those have improved (i.e. much faster) stage 2 and which will use all the memory you can throw at it.
Forum: Data 2021-05-02, 09:56
Replies: 457
Views: 68,364
Posted By axn
There has been no activity (factors found and/or...

There has been no activity (factors found and/or exponents TF'ed) in the last 60 days in that region: https://www.mersenne.ca/status/tf/0/60/5/2690
Forum: Cloud Computing 2021-04-30, 11:25
Replies: 14
Views: 467
Posted By axn
Crunching on on-demand/reserved instances is cost...

Crunching on on-demand/reserved instances is cost prohibitive. But spot instances are much more affordable.
Forum: PrimeNet 2021-04-29, 09:13
Replies: 2,152
Views: 213,340
Posted By axn
Do you mean 2021-02-25 Seth_Tr F-PM1 Factor:...

Do you mean
2021-02-25 Seth_Tr F-PM1 Factor: 6932292235325039464332944259181777 / (P-1, B1=10000000000)?

6932292235325039464332944259181777 is a composite factor made up of previously known small...
Forum: Software 2021-04-28, 02:19
Replies: 291
Views: 23,844
Posted By axn
Noone is asking about using P+1 runs instead of...

Noone is asking about using P+1 runs instead of P-1 runs to find P-1 factors. But, sometimes machines makes mistakes and P-1 runs could miss factors. If we're running P+1 anyways, and if it is...
Forum: Software 2021-04-27, 14:34
Replies: 291
Views: 23,844
Posted By axn
Not sure what you mean, but... AVX512 has worse...

Not sure what you mean, but... AVX512 has worse FFT limits compared to FMA3. The error message looks like the same one in that thread, implying that it exceeds largest available FFT size. IIUC, the...
Forum: Software 2021-04-27, 14:26
Replies: 291
Views: 23,844
Posted By axn
I second this request. There is virtually no cost...

I second this request. There is virtually no cost in throwing in a 'p' in the B1 product. If it helps in finding an odd P-1 factor here or there, that is always a win.
Forum: Information & Answers 2021-04-27, 14:20
Replies: 3
Views: 200
Posted By axn
Possibly this thread...

Possibly this thread (https://www.mersenneforum.org/showthread.php?t=26693) can help?
Forum: GMP-ECM 2021-04-25, 18:20
Replies: 6
Views: 852
Posted By axn
That's just the way the math works out. A...

That's just the way the math works out.
A simple intro: https://en.wikipedia.org/wiki/Williams%27s_p_%2B_1_algorithm

The thing that needs to be smooth is p-(D|p). If (D|p) is -1, then p+1. If...
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