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Forum: Information & Answers 2022-06-27, 16:21
Replies: 21
Views: 573
Posted By axn
The output will show the FFT selected, the worker...

The output will show the FFT selected, the worker configuration, affinities, etc. Let us understand the problem first before attempting a solution/

ECM work you're mentioning (M1000000) is very...
Forum: Information & Answers 2022-06-27, 15:56
Replies: 21
Views: 573
Posted By axn
It would be more helpful if you post the screen...

It would be more helpful if you post the screen outputs from both systems.

BTW, according to ark, E5-2680 v4 is a 14-core system, so you should be able to run 14 threads at the same time.
Forum: Information & Answers 2022-06-26, 13:29
Replies: 6
Views: 448
Posted By axn
We get a shot at fully factoring them. They have...

We get a shot at fully factoring them. They have some mathematical uses (or so I've been told), but is also a fun challenge. See https://www.mersenne.ca/prp.php for the current list of fully...
Forum: Information & Answers 2022-06-19, 04:17
Replies: 6
Views: 448
Posted By axn
It is more efficient to use the full mersenne...

It is more efficient to use the full mersenne number for the FFT operations (because of its special form) rather than just the unfactored part. In fact, even if the unfactored part was just half the...
Forum: FactorDB 2022-06-14, 09:41
Replies: 561
Views: 105,508
Posted By axn
http://www.factordb.com/datenschutz.html - scroll...

http://www.factordb.com/datenschutz.html - scroll to the end. I assume it is current.
Forum: Data 2022-06-12, 03:59
Replies: 148
Views: 11,598
Posted By axn
So... I'm kinda done with 1.0m. There are a few...

So... I'm kinda done with 1.0m. There are a few ones with high B1/low B2 combinations that I don't want to touch. Apart from that, everything is done to decent depth.
Forum: PrimeNet 2022-06-10, 09:53
Replies: 131
Views: 32,510
Posted By axn
https://www.mersenne.ca/exponent/194544733 and...

https://www.mersenne.ca/exponent/194544733 and https://www.mersenne.ca/exponent/194546867 suggests the factors were previously known; merely that the "factor found" entry is not there in primenet.
...
Forum: Data 2022-06-04, 05:24
Replies: 588
Views: 123,139
Posted By axn
"Sid & Andy" is petrw1's GIMPS...

"Sid & Andy" is petrw1's GIMPS username
Forum: Data 2022-06-04, 02:03
Replies: 588
Views: 123,139
Posted By axn
Congrats @petrw1. I believe this is the first...

Congrats @petrw1. I believe this is the first "confirmed kill" for the "low" project
Forum: Software 2022-05-28, 14:33
Replies: 5
Views: 330
Posted By axn
We store about 18 bits per IEEE fp64, so it is...

We store about 18 bits per IEEE fp64, so it is more lime 6-7M. But I guess that just strengthens your case.


Modern processors can do 8-16 floating point ops/cycles (including muls & adds). Data...
Forum: Software 2022-05-27, 05:03
Replies: 654
Views: 106,750
Posted By axn
No. Only (p, 2p+1) is SG When...

No. Only (p, 2p+1) is SG



When p=k*2^n-1, 2p+1 = k*2^(n+1)-1. Both are easily provable by LLR.
When p=k*2^n+1, 2p+1 = k*2^(n+1)+3, but is still provable, since, by definition, we have 100%...
Forum: Lone Mersenne Hunters 2022-05-23, 17:17
Replies: 2,162
Views: 325,755
Posted By axn
Nice!

Nice!
Forum: Soap Box 2022-05-23, 01:54
Replies: 43
Views: 1,257
Posted By axn
(-3.88, -4.92)

(-3.88, -4.92)
Forum: Software 2022-05-23, 01:35
Replies: 613
Views: 49,904
Posted By axn
Precisely.

Precisely.
Forum: Software 2022-05-22, 16:48
Replies: 613
Views: 49,904
Posted By axn
It is. But the essential nature of stage 2...

It is. But the essential nature of stage 2 remains, i.e. k must have one factor between B1 & B2. That doesn't change just because you checked for the factor (i.e. did a gcd) multiple times during...
Forum: Software 2022-05-22, 15:58
Replies: 613
Views: 49,904
Posted By axn
2*k*p+1 Yes, but not specific to 30.8 ...

2*k*p+1


Yes, but not specific to 30.8

It is not so much a problem as it is a limitation of the P-1 algorithm.


For smaller exponents, this shouldn't cost much. But how would this help...
Forum: Software 2022-05-22, 04:41
Replies: 613
Views: 49,904
Posted By axn
3885489 = 3^4* 47969 is not a prime, so gimps...

3885489 = 3^4* 47969 is not a prime, so gimps doesn't track this number. Clearly something went wrong in the assignment itself.

The closest matching prime exponent with no factors is 3885487
Forum: Miscellaneous Math 2022-05-14, 09:20
Replies: 572
Views: 71,676
Posted By axn
What is wrong with you! You have some weird...

What is wrong with you! You have some weird ideas about other people. And math. And probabilities.
Forum: Information & Answers 2022-05-12, 15:14
Replies: 12
Views: 539
Posted By axn
Cool, that's sorted, then. :tu:

Cool, that's sorted, then. :tu:
Forum: GPU Computing 2022-05-12, 12:25
Replies: 7
Views: 755
Posted By axn
K80 produces 110 GHz D/d on PRP tests. It...

K80 produces 110 GHz D/d on PRP tests. It produces 800 GHz D/d on TF.

If factoring is what you want to do, GTX 16xx, RTX 20xx and RTX 30xx are the things to get. For example, 1650 produces 800...
Forum: Information & Answers 2022-05-12, 02:31
Replies: 12
Views: 539
Posted By axn
I suppose that is a sensible interpretation...

I suppose that is a sensible interpretation too... Just not sure that is what OP meant... Anyway, maybe there is some value to this tangent for OP
Forum: Information & Answers 2022-05-12, 02:25
Replies: 12
Views: 539
Posted By axn
Isn't it the former? i.e. How many hours the...

Isn't it the former? i.e. How many hours the program will run as opposed to how many hours the human is sitting in front of the computer? I am not sure I understood the OP's question correctly, but...
Forum: Software 2022-05-11, 15:14
Replies: 613
Views: 49,904
Posted By axn
Doesn't make sense. WIth PFactor, the bounds are...

Doesn't make sense. WIth PFactor, the bounds are determined by the number of tests saved. If it already has a factor, then why bother? Pminus1 has exactly what you need.
Forum: mersenne.ca 2022-05-11, 09:58
Replies: 928
Sticky: mersenne.ca
Views: 124,432
Posted By axn
Not that I'm aware of. I am aware of one...

Not that I'm aware of. I am aware of one condition under which it outputs composite factor, which is when the composite factor is of the correct size. Eg:- Suppose a number has a 35-bit and 40-bit...
Forum: mersenne.ca 2022-05-11, 02:15
Replies: 928
Sticky: mersenne.ca
Views: 124,432
Posted By axn
Considering the fact that a) TF doesn't find...

Considering the fact that a) TF doesn't find composite factors (outside the bit depth), b) the factors are P-1 smooth, and c) missed another factor in the range, this is almost certainly a P-1 find.
Showing results 1 to 25 of 1000

 
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