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Forum: Miscellaneous Math 2021-03-06, 15:20
Replies: 21
Views: 740
Posted By axn
I second this recommendation. Upgrading to a 1650...

I second this recommendation. Upgrading to a 1650 (or 1650 super, if possible) is a quick and painless way to increase you TF thruput 3x and drastically reduce your power consumption at the same...
Forum: Miscellaneous Math 2021-03-06, 12:32
Replies: 21
Views: 740
Posted By axn
On what hardware?

On what hardware?
Forum: Miscellaneous Math 2021-03-06, 10:32
Replies: 21
Views: 740
Posted By axn
The P-1 probability at B1=1M, B2=40M with TF done...

The P-1 probability at B1=1M, B2=40M with TF done to 2^77 is 4.3848. Same probability with TF done to 2^78 is 3.9980. Hence, the overlap of probability is 0.3868 (i.e. the probability that there is a...
Forum: Miscellaneous Math 2021-03-06, 10:15
Replies: 21
Views: 740
Posted By axn
No, it isn't. The chance of a factor if you TF...

No, it isn't. The chance of a factor if you TF from 2^77 to 2^78 is 1/78 or 1.28%. The chance will be reduced if we're doing the TF after P-1, but it will still be closer to 1% rather than 0.07%...
Forum: Miscellaneous Math 2021-03-06, 03:55
Replies: 21
Views: 740
Posted By axn
No, it is 0.3868%, if we go by the calculation....

No, it is 0.3868%, if we go by the calculation. However, I don't trust either of those numbers. I think empirically, it is more like 1%.



It seems like you're trying to rationalize not running...
Forum: Soap Box 2021-02-24, 04:37
Replies: 17
Views: 415
Posted By axn
Surely, you know about the 61st amendment...

Surely, you know about the 61st amendment (https://www.imdb.com/title/tt0106697/quotes/qt0412476)?
Forum: Miscellaneous Math 2021-02-17, 12:54
Replies: 32
Views: 1,413
Posted By axn
Can you double check your math on this one? I'm...

Can you double check your math on this one? I'm not getting the same results.
Forum: Software 2021-02-07, 13:07
Replies: 108
Sticky: Prime95 v30.4
Views: 9,129
Posted By axn
The new stage 2 uses E=2 by default (i.e. only...

The new stage 2 uses E=2 by default (i.e. only prime pairing, no Brent-Suyama extension). If the old stage 2 was using E=12 it will take 6 times longer to initialize compared to E=2.
Apart from...
Forum: Lone Mersenne Hunters 2021-02-05, 14:12
Replies: 1,798
Views: 190,344
Posted By axn
Hmmm... 423 is not relatively prime to 2310, so...

Hmmm... 423 is not relatively prime to 2310, so that is not a valid combo.

:confus:

Are you sure it was D=2310, E=12? D=210 is another option, as is E=6.
Forum: Lone Mersenne Hunters 2021-02-05, 12:35
Replies: 1,798
Views: 190,344
Posted By axn
The poly is (2310*i)^12-j^12, and only j that is...

The poly is (2310*i)^12-j^12, and only j that is relatively prime to 2310 need to be considered. Actually, now that I think about it, could be (4320*i)^12-j^12

EDIT:- If you've used the new 30.4...
Forum: Data 2021-01-30, 02:10
Replies: 347
Views: 49,994
Posted By axn
I am not sure I understand you correctly. Could...

I am not sure I understand you correctly. Could you explain further with an example?
Forum: Cloud Computing 2021-01-27, 08:51
Replies: 20
Views: 948
Posted By axn
Except when they're selling surplus compute power...

Except when they're selling surplus compute power using "spot" prices. They're already burning electricity by keeping the physical hardware on, they might as well try to minimize losses / turn a...
Forum: Lone Mersenne Hunters 2021-01-27, 08:46
Replies: 1,798
Views: 190,344
Posted By axn
No. P95 calculates 3^(Mp+1) == 3^(f+1) to prp...

No. P95 calculates 3^(Mp+1) == 3^(f+1) to prp test Mp/f. So the residue produced is always the same.

By calculating 3^(Mp+1), you can just do repeated squaring (more efficient), which also...
Forum: PrimeNet 2021-01-27, 08:42
Replies: 2
Views: 230
Posted By axn
The residue of the previous tests did not change....

The residue of the previous tests did not change. The residue produced is same regardless of the factors. P95 merely does another calculation at the end to see if the cofactor is a PRP and report it...
Forum: And now for something completely different 2021-01-25, 15:24
Replies: 22
Views: 2,022
Posted By axn
The given value looks like the end point. ...

The given value looks like the end point.

The actual starting point is 10000000000001275924044876917671361...
Forum: Miscellaneous Math 2021-01-24, 13:05
Replies: 17
Views: 913
Posted By axn
Thumbs down You say that 2/(29+13*sqrt(5)) = 1/29. Basically...

You say that 2/(29+13*sqrt(5)) = 1/29. Basically an irrational number = a rational number. That is nonsense.

You haven't mentioned how you obtain your "Hugo" number for a given prime index. For...
Forum: Information & Answers 2021-01-22, 14:23
Replies: 5
Views: 338
Posted By axn
USB stick can work, but is not advisable -- not...

USB stick can work, but is not advisable -- not because of speed, but because of additional wear & tear. How much writes happen depends on the save frequency (which you can customize).

External...
Forum: Information & Answers 2021-01-22, 10:40
Replies: 5
Views: 338
Posted By axn
You can create a shared folder and run mprime off...

You can create a shared folder and run mprime off of it. Only prime.txt, local.txt, worktodo.txt (and the checkpoint files) need to be in the shared folder.

You can then use the -w parameter...
Forum: Information & Answers 2021-01-22, 10:36
Replies: 5
Views: 338
Posted By axn
https://www.mersenne.org/various/math.php#p-1_fact...

https://www.mersenne.org/various/math.php#p-1_factoring
Forum: Software 2021-01-16, 16:43
Replies: 108
Sticky: Prime95 v30.4
Views: 9,129
Posted By axn
I believe they are both used, but for different...

I believe they are both used, but for different purposes. If there is no internet connectivity, the first parameter is used. If there is internet connectivity, but mersenne.org is down, the second...
Forum: Software 2021-01-16, 02:21
Replies: 108
Sticky: Prime95 v30.4
Views: 9,129
Posted By axn
Look in prime.txt. You will see two lines: ...

Look in prime.txt. You will see two lines:
NetworkRetryTime=2
NetworkRetryTime2=70

I suppose you need to change the first one.
Forum: Soap Box 2021-01-15, 13:29
Replies: 16
Views: 1,174
Posted By axn
Wouldn't this run into forced speech / first...

Wouldn't this run into forced speech / first amendment issues?
Forum: Hardware 2021-01-15, 09:45
Replies: 128
Views: 10,356
Posted By axn
Have you tried using MSI Afterburner to downclock...

Have you tried using MSI Afterburner to downclock memory?

Which is faster in gpuowl? Underclocked 6800 or 3070?

What is preventing you from testing in Linux?
Forum: Viliam Furik 2021-01-13, 09:00
Replies: 17
Views: 592
Posted By axn
As retina correctly pointed out, you should use...

As retina correctly pointed out, you should use the thruput figure (iters/s) rather than time (us/iter) to do the calculation. Hence, it is "27% slower" / "37% faster".
Forum: Viliam Furik 2021-01-13, 04:48
Replies: 17
Views: 592
Posted By axn
960/700 = 1.37 which means 37% faster (more...

960/700 = 1.37 which means 37% faster (more thruput).
Showing results 1 to 25 of 1000

 
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