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-   -   Operation Megabit Twin (https://www.mersenneforum.org/showthread.php?t=13439)

Flatlander 2010-05-30 23:25

4T-5T is complete:
[URL="http://www.sendspace.com/file/83jz7t"]http://www.sendspace.com/file/83jz7t[/URL]
1,002,729 candidates. (iirc)

Took about 26 hrs @ 2.66GHz on one C2Quad core. :smile:
Most of which was NewPGen splitting the sieve into little pieces and taking it to 1G; despite reserving 485Mb. 1G to 100G only took about 3 hrs. I asked Paul Jobling some time ago if it was possible to increase the 485Mb limit but he said that Windows wouldn't let him reserve more.
Nobody has mentioned this splitting. I assume I'm doing things right?

Taking 5T-[B]7T[/B] on one core. (Leaving the gap at 3T-4T.)

Oddball 2010-05-31 06:38

[QUOTE=Flatlander;216729]4T-5T is complete:
[URL="http://www.sendspace.com/file/83jz7t"]http://www.sendspace.com/file/83jz7t[/URL]
1,002,729 candidates. (iirc)[/quote]
I think you uploaded the wrong file. That one is ~40% bigger than amphoria's one, and it's only sieved to p=16G. I haven't checked yet, but I think it contains a lot more than 1,002,729 candidates.

[quote]
Took about 26 hrs @ 2.66GHz on one C2Quad core. :smile:
Most of which was NewPGen splitting the sieve into little pieces and taking it to 1G; despite reserving 485Mb. 1G to 100G only took about 3 hrs. I asked Paul Jobling some time ago if it was possible to increase the 485Mb limit but he said that Windows wouldn't let him reserve more.
Nobody has mentioned this splitting. I assume I'm doing things right?
[/QUOTE]
That seems right; the splitting is the most time consuming part of the sieve. If you upload the file to p=100G, I can check a few small random parts of it (4.10T-4.101T, for example) to make sure nothing looks wrong.

[quote]
Off topic edit:
(Hmmm. Time for me to find a new avatar.)[/quote]
I don't know whether you've used it before, but judging from your username, you might want to get a picture of the flat earth. Something like this:

[url]http://www.christopherfowler.co.uk/blog/wp-content/uploads/2010/02/Flat-earth.jpg[/url]

edit:
[quote](Leaving the gap at 3T-4T.)[/quote]
My 0-1T range should be done in two days, so I'll fill up the gap.

Flatlander 2010-05-31 14:46

[QUOTE=Oddball;216752]I think you uploaded the wrong file. That one is ~40% bigger than amphoria's one, and it's only sieved to p=16G.
...[/QUOTE]

Sorry. I rebooted the PC and started with a new filename at 16G.
[URL="http://www.sendspace.com/file/l1ebau"]Correct 4T-5T[/URL]

(Thanks for digging up the avatar. I did have one similar to that many moons ago. I think the fact that I keep changing it must be an identity/mid-life crisis!)

amphoria 2010-05-31 18:39

2T-3T complete.

Taking 7T-8T.

[url]http://www.sendspace.com/file/n9p2iy[/url]

Merfighters 2010-06-01 14:38

I want to join this.
Due to doing something else, I'm just taking the range 8T-9T. :smile:

Edit: I don't want to consume too much time,
so I'm releasing 8.6T~9T.
Edit again: I decided again. I'm not releasing 8.6T~9T. :smile:

Oddball 2010-06-01 19:29

[QUOTE=Merfighters;216928]I want to join this.
Due to doing something else, I'm just taking the range 8T-9T. :smile:

Edit: I don't want to consume too much time,
so I'm releasing 8.6T~9T.
Edit again: I decided again. I'm not releasing 8.6T~9T. :smile:[/QUOTE]
Welcome to TPS! I've added your reservation to the first post.

Merfighters 2010-06-02 04:22

Elapsed time: About 12 hours.
19% of 8T to 9T sieved to 1000000007.

I'm using 300Mb of memory. That's about 10% of the whole memory.
Do I need to use more?

Flatlander 2010-06-02 10:52

5T-7T is complete:
[URL="http://www.sendspace.com/file/rifct6"]http://www.sendspace.com/file/rifct6[/URL]

[QUOTE=Merfighters;217063]Elapsed time: About 12 hours.
19% of 8T to 9T sieved to 1000000007.

I'm using 300Mb of memory. That's about 10% of the whole memory.
Do I need to use more?[/QUOTE]
It's up to you. You might see a efficiency increase if you go to 485Mb, but if it's slowing your PC down because you need the memory for other things ...
It's a low priority project after all.

Running a 2T sieve took 4hrs longer than if I had done 2 x 1T sieves. NewPGen was using 400Mb of RAM even when past 1G. Must be a memory bottleneck? I expect there is a sweet-spot somewhere but I'll probably stick to 1T reservations.

Taking 9T-10T.

Oddball 2010-06-02 20:27

0-1T complete with 1004859 candidates:

[url]http://www.sendspace.com/file/apf3ld[/url]

gribozavr, do you think you can do the bookkeeping for this subproject too? I'm already storing the files on my PC, but it'll be nice to have a backup.

gribozavr 2010-06-03 02:21

I can do the bookkeeping. I've downloaded all files.

amphoria 2010-06-03 16:37

7T-8T complete.

Taking 10T-11T.

[url]http://www.sendspace.com/file/hd9qqi[/url]


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