can't reach server
 

The [URL=http://www.gimps.it]GIMPS italia[/URL] site cannot be reached. I'm changing Internet provider, hope it will be online again soon.

Luigi

[QUOTE=ATH]Webpage says we continue to 73 bits for level 7?[/QUOTE]

Although that's the definition of Level 7, there isn't anything that says we must head directly there. If you'd rather work broader, I don't see anything negative about doing what you want to do.

If there is widespread feeling that the official levels go deep too fast, we could change the definition. A bushier proposal would be that level "N" requires ceiling(N[sup]1.5[/sup]) or N[sup]2[/sup] candidates to bit level 66+N.

Using 1.5, we would currently be approaching level 5, requiring 12 candidates at 71 bits.

Using 2.0, we would currently be approaching level 4, requiring 16 candidates at 70 bits.

We could even do all of these, using these a measure for how many 71 and 70 and 69's we should have when we have 6 at 72,

What makes it the most fun for people?

William

M3321928927 no factor from 2^71 to 2^72.

I would like to reserve 3321928999. And congratulations to everybody to reaching level 6 :)

Thomas

M3321929197 no factor from 2^67 to 2^68.

Edit: I usually use Luigi's site, but since it's down I went to William's and it said I was active to 71 on M3321929041. I guess I could start on that.

M3321928699 no factor from 2^67 to 2^68.
M3321928963 no factor from 2^71 to 2^72.

Andres

M3321928373 no factor from 2^69 to 2^70.

Factor3_2p SSE2 enabled!
 

And finally here it is!

I compiled a Factor3_2 version with SSE2 enabled and GMP 4.1.3 (it's called Factor3_2p and Factor3_2pb).

It is about 150%-200% faster on SSE2 enabled machines (Pentium IV, as I don't have an Athlon64 machine to test it :rolleyes: ) relative to version 3.2 "plain Athlon-vanilla".

I'm also working on a benchmark page to show relative speed and overall performance on a "per-machine" basis. As we know, GMP seems best suited for Athlons, but the difference is not so big.

Stay tuned, I'm reworking my "Operation Billion Digits" webpage, I'll upload it as soon as my new ISP will give me access to it.

Meanwhile, have fun and happy crunching! :banana:

Luigi

P.S. The file is heavy (115 KB) and I can't attach it here. You can wait until my webpage will be online again, or PM me your e-mail address :sad:

Some more results:

M3321929059 no factor from 2^67 to 2^68.
M3321929113 no factor from 2^67 to 2^68.

And I also reserve

M3321929173, M3321929179 and M3321929209 which I'll factor up to 68 bits.

Cheers,
Andres

M3321929173 no factor from 2^67 to 2^68.
M3321929179 no factor from 2^67 to 2^68.
M3321929209 no factor from 2^67 to 2^68.

I reserve

M3321929411
M3321929461
M3321929519
M3321929563
M3321929573
M3321929579

for factoring up to 68 bits.

Andres

Reserving 3321929909....

PS. I could use new SSE2-version :cool:

[QUOTE=Gipe]Reserving 3321929909....

PS. I could use new SSE2-version :cool:[/QUOTE]

I will send you the client as soon as possible :-)

Up to which bit are you going to check?

Luigi