mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Blogorrhea > storflyt32

Reply
 
Thread Tools
Old 2014-10-15, 22:22   #23
Batalov
 
Batalov's Avatar
 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

22·2,393 Posts
Default

What was pulled out again? The prime cofactor of the algebraic factor (2^6979-1)/(2^997-1), a.k.a. Phi7(2^997)? It's there.

Last fiddled with by Batalov on 2014-10-15 at 22:25
Batalov is offline   Reply With Quote
Old 2014-10-20, 10:45   #24
storflyt32
 
Feb 2013

2×229 Posts
Default

Still getting a C41715 here both from yafu-x64's "factor" command and also by running the ecm command also with yafu-x64.

This time having the output to the screen (or monitor) instead of a file.

Took a bit of time to get the

=============================================
ecm: 0/1 curves on C41715, B1=11K, B2=gmp-ecm default

visible.

Last fiddled with by storflyt32 on 2014-10-20 at 10:47
storflyt32 is offline   Reply With Quote
Old 2014-10-20, 14:02   #25
bsquared
 
bsquared's Avatar
 
"Ben"
Feb 2007

2·1,789 Posts
Default

Quote:
Originally Posted by storflyt32 View Post
Still getting a C41715 here both from yafu-x64's "factor" command and also by running the ecm command also with yafu-x64.

This time having the output to the screen (or monitor) instead of a file.

Took a bit of time to get the

=============================================
ecm: 0/1 curves on C41715, B1=11K, B2=gmp-ecm default

visible.
I assume you are still going on about this. Just because you can print it does not make it so.

I am sorry that yafu does not work on every conceivable input, but the fact remains that it was not designed to work on numbers like this. Why would you insist that yafu is right when every other piece of software that *was* designed for numbers like this disagree with it?
bsquared is offline   Reply With Quote
Old 2015-06-24, 06:41   #26
storflyt32
 
Feb 2013

2×229 Posts
Default

Do not know where to post this.

http://factordb.com/index.php?id=1100000000785525326

Lying at the bottom of my checkfacts.txt file, the number fits into the factorize line in the Factor Database.

Just clicking the Factorize button, it first became "U" for unknown.

Clicking the button again and I was told it was a PRP3759.

This time it apparently was not because of me.

Whose responsibility is to update what and where and if a given number turns out to be a quite large one,
who should be credited with the find or discovery?

Last fiddled with by storflyt32 on 2015-06-24 at 07:30
storflyt32 is offline   Reply With Quote
Old 2015-06-24, 11:31   #27
VictordeHolland
 
VictordeHolland's Avatar
 
"Victor de Hollander"
Aug 2011
the Netherlands

23×3×72 Posts
Default

Quote:
Originally Posted by storflyt32 View Post
Do not know where to post this.

http://factordb.com/index.php?id=1100000000785525326

Lying at the bottom of my checkfacts.txt file, the number fits into the factorize line in the Factor Database.

Just clicking the Factorize button, it first became "U" for unknown.

Clicking the button again and I was told it was a PRP3759.

This time it apparently was not because of me.

Whose responsibility is to update what and where and if a given number turns out to be a quite large one,
who should be credited with the find or discovery?
The factordb server probably ran a PRP check.
On the status page, one core of the 2600k is dedicated to do this:
"Checking the smallest number with status unknown <20000 digits"
VictordeHolland is offline   Reply With Quote
Old 2015-06-25, 11:55   #28
schickel
 
schickel's Avatar
 
"Frank <^>"
Dec 2004
CDP Janesville

212210 Posts
Default

schickel is offline   Reply With Quote
Old 2015-07-15, 21:04   #29
storflyt32
 
Feb 2013

7128 Posts
Default

http://factordb.com/index.php?id=1100000000792308300

The remaining C103 is a very difficult one.

Running it using ecm only could possibly work, but would probably take a very long time, depending on the number of curves which are being selected.

Most likely the 9704 curves being used by the Yafu software is not enough for this number.

Therefore a larger number of curves are needed, increasing the number it takes to complete.
storflyt32 is offline   Reply With Quote
Old 2015-07-15, 22:55   #30
jasonp
Tribal Bullet
 
jasonp's Avatar
 
Oct 2004

3·1,181 Posts
Default

You don't have an hour to factor this yourself?
jasonp is offline   Reply With Quote
Old 2015-07-15, 23:46   #31
schickel
 
schickel's Avatar
 
"Frank <^>"
Dec 2004
CDP Janesville

41128 Posts
Default

Quote:
Originally Posted by jasonp View Post
You don't have an hour to factor this yourself?
Actually, a little more than an hour, but then I couldn't run my full 6 cores becuase of the ambient temp....
schickel is offline   Reply With Quote
Old 2015-07-16, 10:04   #32
storflyt32
 
Feb 2013

2×229 Posts
Default

I notice the factorization of the remaining C103.

Thank you very much for doing that.

Appreciated.
storflyt32 is offline   Reply With Quote
Old 2015-07-17, 02:28   #33
Jayder
 
Jayder's Avatar
 
Dec 2012

2·139 Posts
Default

Here is another interesting one. I have recently stumbled onto this C81 (link). This will be a difficult one to crack. In fact, it will likely take longer than the age of the universe to factor. I have already started trial factoring with my pocket calculator, and will let you all know of any results.
Jayder is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can Pollard Rho cycles be used to find a factor? wwf Factoring 26 2013-09-30 04:24
PFGW can't find a small factor. Arkadiusz Software 7 2013-02-18 12:43
Chance to find an n-digit factor with ECM RedGolpe Factoring 4 2007-03-23 15:24
How much ECM does it take to find a given factor? geoff Factoring 5 2004-09-29 20:14
Where I find the best program to it factor keys? I use AMD. chrow Factoring 5 2004-02-19 10:15

All times are UTC. The time now is 09:32.


Mon Oct 25 09:32:07 UTC 2021 up 94 days, 4:01, 0 users, load averages: 0.99, 1.40, 1.51

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.