mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 816
Search took 0.12 seconds.
Search: Posts Made By: charybdis
Forum: NFS@Home 2022-08-17, 00:38
Replies: 142
Views: 17,904
Posted By charybdis
2,1467- is a Cunningham composite of SNFS...

2,1467- is a Cunningham composite of SNFS difficulty 294 from the base-2 extension. It is ready for SNFS with 16e-small, once the queue eventually reaches it...

n:...
Forum: Factoring 2022-08-16, 19:31
Replies: 50
Views: 1,502
Posted By charybdis
Alternatively you can add niceness=19 to the...

Alternatively you can add niceness=19 to the command line to run tasks at low priority - though for some reason this only applies to processes run by clients rather than the server, so filtering,...
Forum: Factoring 2022-08-15, 14:29
Replies: 50
Views: 1,502
Posted By charybdis
I suspect that CADO deletes the directory if and...

I suspect that CADO deletes the directory if and only if you don't set workdir yourself. If you pick a directory yourself then it won't get deleted straight away, even if it's in /tmp. Though I'd...
Forum: Factoring 2022-08-15, 00:05
Replies: 50
Views: 1,502
Posted By charybdis
Thanks. I also tried with an April revision -...

Thanks. I also tried with an April revision - from later in the same day, in fact - and it ran fine. However, it doesn't produce the same matrix, as there have been some revisions to the merge code...
Forum: Factoring 2022-08-14, 23:50
Replies: 50
Views: 1,502
Posted By charybdis
In the course of investigating the bug, I found...

In the course of investigating the bug, I found that resuming CADO - i.e. just running it again with the same command line - actually completes the factorization successfully after the crash. But of...
Forum: CADO-NFS 2022-08-14, 23:46
Replies: 3
Views: 63
Posted By charybdis
Done. (it's easy, all you need to do is email...

Done.
(it's easy, all you need to do is email cado-nfs AT inria DOT fr, and you can subscribe here (https://sympa.inria.fr/sympa/info/cado-nfs))
Forum: Factoring 2022-08-14, 23:35
Replies: 50
Views: 1,502
Posted By charybdis
The factors are in the c130.log (or similar) file...

The factors are in the c130.log (or similar) file in the directory you set as workdir. (Hence why it's important to set workdir - if you let CADO put the factors in /tmp then they're liable to be...
Forum: CADO-NFS 2022-08-14, 22:42
Replies: 3
Views: 63
Posted By charybdis
Reproduced, this is a genuine bug. It's not there...

Reproduced, this is a genuine bug. It's not there in revision 7eb15697 from last November so must have been introduced since then. Rolling back to that revision should sort you out for now.

Would...
Forum: Forum Feedback 2022-08-14, 21:14
Replies: 39
Views: 960
Posted By charybdis
Yes, I'm well aware of these earlier examples -...

Yes, I'm well aware of these earlier examples - though of course the Analytical Engine was never built. I should have said "electronic computers" or something to that effect, but that's not really...
Forum: Forum Feedback 2022-08-14, 18:47
Replies: 39
Views: 960
Posted By charybdis
How will that hold up in court? "I shouldn't be...

How will that hold up in court? "I shouldn't be guilty because 100 years ago I wouldn't have been guilty, never mind that computers didn't exist 100 years ago..."
Forum: Factoring 2022-08-14, 18:44
Replies: 50
Views: 1,502
Posted By charybdis
@storm5510, while we wait for the bug to be...

@storm5510, while we wait for the bug to be fixed, I suggest downloading an older revision of CADO and using that instead:

git clone https://gitlab.inria.fr/cado-nfs/cado-nfs.git
cd cado-nfs
git...
Forum: Factoring 2022-08-14, 18:31
Replies: 50
Views: 1,502
Posted By charybdis
I was able to reproduce the crash on RSA-100 with...

I was able to reproduce the crash on RSA-100 with the latest version of CADO. It doesn't appear on every number so is likely matrix-dependent. Now to find out when it was introduced and report it.
Forum: Factoring 2022-08-14, 17:39
Replies: 50
Views: 1,502
Posted By charybdis
Not true. The main CADO readme even has examples...

Not true. The main CADO readme even has examples with just "workdir".
Forum: Forum Feedback 2022-08-14, 17:33
Replies: 39
Views: 960
Posted By charybdis
Marcel was sued by Microsoft...

Marcel was sued by Microsoft (https://mersenneforum.org/showpost.php?p=580924&postcount=4), as you would have known if you'd done a little bit of forum searching. Do you think he's suddenly going to...
Forum: Factoring 2022-08-13, 22:50
Replies: 50
Views: 1,502
Posted By charybdis
Using shortcuts in the path is fine. CADO creates...

Using shortcuts in the path is fine. CADO creates a directory in /tmp by default, but you can put the path anywhere you want, preferably not in /tmp.

Why do you care about the length of the...
Forum: Factoring 2022-08-13, 17:03
Replies: 50
Views: 1,502
Posted By charybdis
Workdir sets the directory where CADO will put...

Workdir sets the directory where CADO will put all the files related to its current job. You should make a new one for each job and give it a helpful name, e.g. if you were factoring the 139-digit...
Forum: Aliquot Sequences 2022-08-13, 14:34
Replies: 164
Views: 54,039
Posted By charybdis
Sweety is unsurprisingly banned from OEIS. You...

Sweety is unsurprisingly banned from OEIS. You reap what you sow.
Forum: Factoring 2022-08-13, 13:19
Replies: 50
Views: 1,502
Posted By charybdis
Looks like polynomial selection and sieving went...

Looks like polynomial selection and sieving went smoothly, but there was a crash in linear algebra. I've never seen this particular crash before. If they haven't been wiped yet, could you post the...
Forum: Dobri 2022-08-13, 11:10
Replies: 51
Views: 4,806
Posted By charybdis
These have the simplest explanation of all. If p...

These have the simplest explanation of all. If p and k are both 2 mod 3 then 2kp+1 is divisible by 3 and so can't be prime.
Forum: NFS@Home 2022-08-09, 17:24
Replies: 103
Views: 6,028
Posted By charybdis
This does make sense for numbers where the...

This does make sense for numbers where the algebraic and rational norms are very similar in size. The special-q essentially gives you a large prime for free on the side that you're sieving on, so...
Forum: Dobri 2022-08-08, 11:42
Replies: 51
Views: 4,806
Posted By charybdis
This is equivalent to saying that if 8p+1 is...

This is equivalent to saying that if 8p+1 is prime and of the form (2a-1)^2+64(2b-1)^2, then 2 is an 8th power mod 8p+1.

You've rediscovered an old result on when 2 is an 8th power modulo a prime....
Forum: NFS@Home 2022-08-08, 11:19
Replies: 103
Views: 6,028
Posted By charybdis
2^lpb is the cutoff for the size of the largest...

2^lpb is the cutoff for the size of the largest primes/ideals that can appear in relations. Increasing lpb means that you find more relations, because you're allowing larger primes. But you also need...
Forum: Aliquot Sequences 2022-08-08, 11:13
Replies: 164
Views: 54,039
Posted By charybdis
You're right about more equations than unknowns,...

You're right about more equations than unknowns, but the equations correspond to ideals, not relations. The equations encode "this ideal must appear an even number of times in the desired set of...
Forum: Msieve 2022-08-07, 18:16
Replies: 100
Views: 839
Posted By charybdis
You've already been talking to the author. He is...

You've already been talking to the author. He is "frmky". (Edit for clarification: he's only the author of that github repo with the GPU linear algebra and multithreaded square root. The main author...
Forum: NFS@Home 2022-08-07, 13:20
Replies: 103
Views: 6,028
Posted By charybdis
The number of relations needed is determined by...

The number of relations needed is determined by the lpb bounds, not by the size of the number. Increase each lpb by 1 and you ~double the number of relations required. The mfb bounds also have an...
Showing results 1 to 25 of 816

 
All times are UTC. The time now is 01:55.


Wed Aug 17 01:55:51 UTC 2022 up 40 days, 20:43, 1 user, load averages: 1.64, 1.49, 1.35

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, 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.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎𝜍 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔