M3321928307 no factor from 2^71 to 2^72.

I would [I]suggest[/I] that the 72 bit level be a stopping point, until faster machines (say P5 8GHz) are available. We can run more expos up to 72, but not go for 73 for a while.

Oki !
 

Took 3321928787 to 67 and found a factor :
M3321928787 has a factor: 108855788204768513089
I would then like to reserve
3321928777 from 66 to 68

Thomas :w00t:

Is the windows client optimized for P4 cpus or Athlons ?

[QUOTE=thomasn]Is the windows client optimized for P4 cpus or Athlons ?[/QUOTE]

The Windows client is lightly optimized for Athlons, as I installed GMP library on a Athlon.

I will work on a P-IV version next month (but don't expect a huge increase of performance...).

Luigi

[QUOTE=Uncwilly]M3321928307 no factor from 2^71 to 2^72.

I would [I]suggest[/I] that the 72 bit level be a stopping point, until faster machines (say P5 8GHz) are available. We can run more expos up to 72, but not go for 73 for a while.[/QUOTE]

I agree... We still have a lot of exponents ready to low-factoring, while people is still joining.

Luigi

I did this.

Does this help?

What do I do next?


Please enter the exponent to be factored: 2^195000271

Now enter start bit depth : 1
Finally enter end bit depth : 50

Sieving from 2^2 up to 2^50...
M195000271 has a factor: 129175979521241 46.876 bit depth
k=3079076, d=1200841308859193 50.093 bit depth
Time: 7 secs.


Citrix
:cool: :cool: :cool:

[QUOTE=Citrix]Does this help?

What do I do next?


Please enter the exponent to be factored: 2^195000271

Now enter start bit depth : 1
Finally enter end bit depth : 50

Sieving from 2^2 up to 2^50...
M195000271 has a factor: 129175979521241[/QUOTE]

It doesn't help Operation Billion Digits because doesn't have a billion digits.

However, Will Edgington collects all Mersenne factors, so it extends mankind's collected knowledge of known factors.

To contribute to Operation Billion Digits you should pick an inactive unfactored exponent from the status page at
[url]http://ElevenSmooth.com/Billion.html[/url]

William

M3321928219 no factor from 2^70 to 2^71.

Onward to 72


Cedric Vonck reports no factors between 65 abd 66 for
3321929411
3321929461
3321929519

He is now testing 65 to 66 for
3321929563
3321929573
3321929579
3321929827
3321929909


I reorganized the status page to make it easier to locate the unfactored exponents. The factored and unfactored exponents now show up in separate columns. Let me know whether this is better or worse than the old way.

[url]http://ElevenSmooth.com/Billion.html[/url]

William

I got 3321929927

Citrix
:cool: :cool: :cool:

I will take 3321928921 to 67.

Sieving from 2^66 up to 2^67...
k=22212284100, d=147575257906516912201
M3321928921 no factor from 2^66 to 2^67.

Time: 19645 secs.

This on one Athlon MP1900 (1.6 Ghz). Since this is nearly twice as fast as my p4 2.4 GHz, i think I will crunch on the Athlon.

So I would like to continue to reserve M3321928921, and I will see how far I take it.

Thomas