Certificate : For all indents and purposes - Page 8

henryzz · 2016-12-08, 11:18

Just thought I would point out that I was only working on 985. 986+ are available.

Jayder · 2016-12-08, 17:49

I was wondering about that. When I'm done my batch going from 1000 - ~1800 I'll do those ones.

schickel · 2016-12-10, 20:42

For one glorious instant (someone has a job running that crams more PRPs in as they get cleared):

chris2be8 · 2016-12-11, 17:05

That is probably my script adding algebraic factors to composites in factordb. It's partly (and sometimes fully) factoring a few thousand numbers per day. And some of them will be left as one big PRP after algebraic factors are removed.

Chris

schickel · 2016-12-11, 22:44

Quote:

Originally Posted by chris2be8

That is probably my script adding algebraic factors to composites in factordb. It's partly (and sometimes fully) factoring a few thousand numbers per day. And some of them will be left as one big PRP after algebraic factors are removed.

Chris

That makes me feel better. I didn't like the thought of someone just cramming PRPs in for the hell of it. Tackling some of the backlog of unfactored composites would at least be some progress.

Jayder · 2016-12-13, 00:21

Quote:

Originally Posted by schickel

For one glorious instant (someone has a job running that crams more PRPs in as they get cleared):

Isn't it nice? :)

Any ranges that I should stay out of? Can I go as low as 300?

schickel · 2016-12-13, 05:45

Quote:

Originally Posted by Jayder

Isn't it nice? :)

Very nice! The count for PRPs <3000 digits stood at 100,000+ before this last burst of proving. We're down to <30,000 currently.

Quote:

Any ranges that I should stay out of? Can I go as low as 300?

I don't think there are very many working on the PRPs right now: me, you, henryzz, pakaran was last active a year ago.

I like to grab everything under 1000 digits every so often and work them with one of my slower systems (it's still running the Win version.) Don't let that stop you, though, there will still be more if you finish everything again.

schickel · 2016-12-22, 15:46

Fantastic: a couple of more dumps from Jayder and we'll have the PRPs <3000 digits conquered again. After the current batch finishes, we'll be at ~12,500 and I've got a batch of 600 that will be done this afternoon, so almost there!

pakaran · 2017-01-02, 02:50

I went inactive because I have my new machine running straight Windows 10.

Has anyone got Primo running under VM? Sorry if this is an FAQ.

schickel · 2017-01-02, 07:35

Quote:

Originally Posted by pakaran

I went inactive because I have my new machine running straight Windows 10.

Has anyone got Primo running under VM? Sorry if this is an FAQ.

I run Primo in VirtualBox under Windows 7. It was actually easy to set up. Just download a Linux distro, create a VHD to install on, mount the .iso image in VirtualBox, and boot the virtual machine to install.

Best scenario is running a 64-bit host since Primo is 64-bit. I think you can run a 64-bit guest on a 32-bit host, but I'm not sure what kind of speed penaly you might face. I'm running Ubuntu (not the most current version, since the VM doesn't emulate the video hardware to run it optimally.) It also helps to have a current CPU that supports the virtualization stuff to help the execution speed..

danaj · 2017-01-02, 20:05

I have a new Windows 10 laptop I got for development while traveling, and one of the first things I did was add VirtualBox with Ubuntu. It seems to work just fine -- it's an Ubuntu machine running at the same time as Win10.

It's an i7-6700HQ and I needed to go into the BIOS and turn on VT-x, which is apparently commonly off by default on laptops. That enables running 64-bit guest OS's, which is pretty critical. I gave it 4 CPUs and 8GB RAM (the processor is a 4/8 just like many of the Intel i7 desktops, albeit at a lower clock speed, and the machine has 16GB of RAM total).

I just downloaded Primo 4.2.1 from the website, install p7zip, and ran it. No issues.

Time for "Titanic1" using 4 CPUs and all default settings: 55.6s. i7-6700HZ 3.1GHz (that's what CPU-Z indicated while it ran primo -- it's highly dynamic based on load).

Time on my desktop: 43.3s. i7-6700K 4.2GHz (and faster memory).

The ratio of times is not dis-similar from the ratio of clock speeds. The tradeoff is that the slower machine is highly portable and did all that on battery power, while the desktop is not.

On the desktop, using 8 threads cuts the time down to 34.6s. I would need to restart the VM to test that on the laptop.

2016-12-10, 20:42	#80
schickel "Frank <^>" Dec 2004 CDP Janesville 2·1,061 Posts	For one glorious instant (someone has a job running that crams more PRPs in as they get cleared): Attached Thumbnails

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2016-12-08, 11:18	#78
henryzz Just call me Henry "David" Sep 2007 Cambridge (GMT/BST) 2·2,909 Posts	Just thought I would point out that I was only working on 985. 986+ are available.

2016-12-08, 17:49	#79
Jayder Dec 2012 2·139 Posts	I was wondering about that. When I'm done my batch going from 1000 - ~1800 I'll do those ones.

2016-12-11, 17:05	#81
chris2be8 Sep 2009 2003₁₀ Posts	That is probably my script adding algebraic factors to composites in factordb. It's partly (and sometimes fully) factoring a few thousand numbers per day. And some of them will be left as one big PRP after algebraic factors are removed. Chris

2016-12-22, 15:46	#85
schickel "Frank <^>" Dec 2004 CDP Janesville 2·1,061 Posts	Fantastic: a couple of more dumps from Jayder and we'll have the PRPs <3000 digits conquered again. After the current batch finishes, we'll be at ~12,500 and I've got a batch of 600 that will be done this afternoon, so almost there!

2017-01-02, 02:50	#86
pakaran Aug 2002 3×83 Posts	I went inactive because I have my new machine running straight Windows 10. Has anyone got Primo running under VM? Sorry if this is an FAQ.

2017-01-02, 20:05	#88
danaj "Dana Jacobsen" Feb 2011 Bangkok, TH 2²·227 Posts	I have a new Windows 10 laptop I got for development while traveling, and one of the first things I did was add VirtualBox with Ubuntu. It seems to work just fine -- it's an Ubuntu machine running at the same time as Win10. It's an i7-6700HQ and I needed to go into the BIOS and turn on VT-x, which is apparently commonly off by default on laptops. That enables running 64-bit guest OS's, which is pretty critical. I gave it 4 CPUs and 8GB RAM (the processor is a 4/8 just like many of the Intel i7 desktops, albeit at a lower clock speed, and the machine has 16GB of RAM total). I just downloaded Primo 4.2.1 from the website, install p7zip, and ran it. No issues. Time for "Titanic1" using 4 CPUs and all default settings: 55.6s. i7-6700HZ 3.1GHz (that's what CPU-Z indicated while it ran primo -- it's highly dynamic based on load). Time on my desktop: 43.3s. i7-6700K 4.2GHz (and faster memory). The ratio of times is not dis-similar from the ratio of clock speeds. The tradeoff is that the slower machine is highly portable and did all that on battery power, while the desktop is not. On the desktop, using 8 threads cuts the time down to 34.6s. I would need to restart the VM to test that on the laptop.