Operation Megabit Twin

[Flatlander]

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

Took about 26 hrs @ 2.66GHz on one C2Quad core.
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-7T on one core. (Leaving the gap at 3T-4T.)

[Oddball]

Originally Posted by Flatlander

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

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.

Took about 26 hrs @ 2.66GHz on one C2Quad core.
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?

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.

Off topic edit:
(Hmmm. Time for me to find a new avatar.)

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:

http://www.christopherfowler.co.uk/b...Flat-earth.jpg

edit:

(Leaving the gap at 3T-4T.)

My 0-1T range should be done in two days, so I'll fill up the gap.

[Flatlander]

Originally Posted by Oddball

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

Sorry. I rebooted the PC and started with a new filename at 16G.
Correct 4T-5T

(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]

2T-3T complete.

Taking 7T-8T.

http://www.sendspace.com/file/n9p2iy

[Merfighters]

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

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.

[Oddball]

Originally Posted by Merfighters

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

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.

Welcome to TPS! I've added your reservation to the first post.

[Merfighters]

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]

5T-7T is complete:
http://www.sendspace.com/file/rifct6

Originally Posted by Merfighters

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?

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]

0-1T complete with 1004859 candidates:

http://www.sendspace.com/file/apf3ld

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]

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

[amphoria]

7T-8T complete.

Taking 10T-11T.

http://www.sendspace.com/file/hd9qqi