mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.31 seconds.
Search: Posts Made By: VBCurtis
Forum: NFS@Home 2020-11-24, 19:48
Replies: 87
Views: 3,881
Posted By VBCurtis
Definitely. I think I'll do a little 10kQ...

Definitely.
I think I'll do a little 10kQ test-sieve to see how much CPU time the extra sieving takes, to compare to matrix time saved.

The new queues and new organization rules are working...
Forum: Lounge 2020-11-24, 19:20
Replies: 4,127
Views: 263,523
Posted By VBCurtis
Frank Zappa's song "Valley Girl" is worth a...

Frank Zappa's song "Valley Girl" is worth a listen as a caricature of this use of language. I moved to the LA area in 1987, and there were definitely girls at my high school who intentionally spoke...
Forum: NFS@Home 2020-11-24, 18:01
Replies: 87
Views: 3,881
Posted By VBCurtis
Sounds like way too big a matrix for an e-small...

Sounds like way too big a matrix for an e-small job. Maybe add 10MQ, if you haven't already moved it to post-processing?
Or, we could do some sieving locally. Let's knock off at least a week from...
Forum: Aliquot Sequences 2020-11-23, 23:34
Replies: 684
Views: 37,195
Posted By VBCurtis
Squaring the 31 is the manner in which one breaks...

Squaring the 31 is the manner in which one breaks 2^4 * 31.
Other powers of 2 would not be a driver; only the perfect number 496 = 2^4 * 31 is a driver.
I believe the same is true for the other...
Forum: Factoring 2020-11-23, 19:18
Replies: 9
Views: 333
Posted By VBCurtis
What does finding more factors in stage 2 have to...

What does finding more factors in stage 2 have to do with that "multiple factors" statement? Those seem completely unconnected, yet you used "because of this". So, I too fear there is a substantial...
Forum: Software 2020-11-23, 16:40
Replies: 35
Views: 4,571
Posted By VBCurtis
At the command line: taskset -c 0-5 ./sllr64 -d ...

At the command line: taskset -c 0-5 ./sllr64 -d

That instance of llr is bound to those 6 cores.
Forum: Aliquot Sequences 2020-11-22, 18:18
Replies: 684
Views: 37,195
Posted By VBCurtis
That's not unusual, at all! I guess I just don't...

That's not unusual, at all! I guess I just don't encounter 2^4 * 31 often enough to pay attention. I appreciate the data!
Forum: Aliquot Sequences 2020-11-22, 16:59
Replies: 684
Views: 37,195
Posted By VBCurtis
13^64. It got down under 50 digits, but picked up...

13^64. It got down under 50 digits, but picked up 2 * 3 so it's back above 110 dig now.

13^58, 60, 62 can be updated on your page also.
Forum: Aliquot Sequences 2020-11-22, 05:22
Replies: 684
Views: 37,195
Posted By VBCurtis
How unusual is it to break 2^4 * 31? I don't...

How unusual is it to break 2^4 * 31? I don't think I've done it before tonight.

Edit: The sequence went 2^4 * 3 * 31 to 2^4 * 3 * 31^2 to 2^6 * 3 * 31, and picked up the downdriver a few terms...
Forum: Information & Answers 2020-11-21, 05:18
Replies: 27
Views: 785
Posted By VBCurtis
If you're drawing 530W from a 500W power supply,...

If you're drawing 530W from a 500W power supply, your hardware will not last long. If you're somewhat lucky, the power supply will fail. If you're less lucky, it'll fail in a way that blows up the...
Forum: NFS@Home 2020-11-20, 19:39
Replies: 87
Views: 3,881
Posted By VBCurtis
5*2^791-1 has factors: p57 factor:...

5*2^791-1 has factors:
p57 factor: 151880995471420485563260391583287247457005251131509944599
p67 factor: 5080420584742637766232124038334332110925922349448403765063448735173
p102 factor:...
Forum: Miscellaneous Math 2020-11-19, 22:42
Replies: 10
Views: 392
Posted By VBCurtis
Yep, I misunderstood you. I thought you were...

Yep, I misunderstood you. I thought you were claiming you had created something more rigorous than the twin primes conjecture to "prove" the infinitude of twin primes.

I don't even know what a...
Forum: NFS@Home 2020-11-19, 18:40
Replies: 23
Views: 1,188
Posted By VBCurtis
On the quintic 16/31 as you wish to submit, I'd...

On the quintic 16/31 as you wish to submit, I'd try bumping alim to 200M while leaving rlim alone. Both yield and sec/rel should improve slightly.
I'd also try mfba of 61 or 60- you might not gain...
Forum: Miscellaneous Math 2020-11-19, 00:14
Replies: 10
Views: 392
Posted By VBCurtis
Did you read the article? Or perhaps I'm...

Did you read the article?

Or perhaps I'm missing what you are trying to achieve; it appears you're rephrasing long-known heuristics and trying to then claim that you've reached a new conclusion...
Forum: FactorDB 2020-11-18, 22:25
Replies: 53
Views: 3,470
Posted By VBCurtis
I am now an elf! Your script prompted me to...

I am now an elf! Your script prompted me to install pari-gp, and I'm running it on 27-digit composites. Not sure how long I'll leave it going, but at 26 and 27 digits most of the numbers split into...
Forum: YAFU 2020-11-18, 16:59
Replies: 6
Views: 178
Posted By VBCurtis
The manual effort to make sure each computer is...

The manual effort to make sure each computer is doing separate Q-ranges, and then combining the files and running the post-processing manually is rather tedious, and usually not used for jobs that...
Forum: YAFU 2020-11-18, 06:28
Replies: 4
Views: 156
Posted By VBCurtis
Welcome! 256-bit inputs are small, and YAFU...

Welcome!
256-bit inputs are small, and YAFU will run the quadratic sieve to factor them. This method is faster for inputs below about 100 decimal digits, but the time to factor scales more steeply...
Forum: Software 2020-11-18, 06:19
Replies: 457
Views: 37,524
Posted By VBCurtis
Buy a discrete GPU? If your GPU doesn't support...

Buy a discrete GPU? If your GPU doesn't support some OpenCL instructions, seems your options are different hardware or run different software.
Forum: Miscellaneous Math 2020-11-18, 04:36
Replies: 10
Views: 392
Posted By VBCurtis
Well, I think both your numbered assumptions are...

Well, I think both your numbered assumptions are incorrect. I think the probabilities are *not* independent, and if they're not the rest of your reasoning doesn't achieve anything.

This article...
Forum: Hardware 2020-11-17, 22:15
Replies: 68
Views: 5,035
Posted By VBCurtis
Single-Rank stock, please.

Single-Rank stock, please.
Forum: Aliquot Sequences 2020-11-17, 22:13
Replies: 466
Views: 34,671
Posted By VBCurtis
Thanks, Ryan! We appreciate it.

Thanks, Ryan! We appreciate it.
Forum: Hardware 2020-11-17, 19:32
Replies: 68
Views: 5,035
Posted By VBCurtis
I don't think msieve is memory-limited with just...

I don't think msieve is memory-limited with just 6 cores, so I doubt the single-rank memory will be much slower than your dual-rank benchmark. Perhaps 3-5% = 10-15 min slower?

I'm prepared to be...
Forum: Five or Bust - The Dual Sierpinski Problem 2020-11-17, 16:56
Replies: 7
Views: 265
Posted By VBCurtis
https://primes.utm.edu/top20/page.php?id=27...

https://primes.utm.edu/top20/page.php?id=27 suggests you're mistaken about the size of numbers Primo can handle.

Maybe you should run that Primo proof yourself- it's just 25% or so more digits...
Forum: Five or Bust - The Dual Sierpinski Problem 2020-11-17, 06:41
Replies: 7
Views: 265
Posted By VBCurtis
LLR, or pfgw. Time taken depends rather heavily...

LLR, or pfgw. Time taken depends rather heavily on hardware, just like it does for Prime95.
A prp test is about the same speed as what P95 would take on that same size of exponent.
Forum: Information & Answers 2020-11-17, 06:39
Replies: 27
Views: 785
Posted By VBCurtis
1. How is going from 15.6ms to 11.2 "no gains"? ...

1. How is going from 15.6ms to 11.2 "no gains"?
2. You now have a grasp of the concept of memory saturation. Prime95 on many architectures is limited by memory transfer speed rather than CPU speed....
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 21:39.

Tue Nov 24 21:39:51 UTC 2020 up 75 days, 18:50, 4 users, load averages: 3.26, 3.11, 3.15

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.