Operation: Billion Digits - Page 50

ValerieVonck · 2005-02-14, 19:07

3321932969 from 60 to 63 [Reserved]

Can I use P5v246 for offline factoring exponents?

ValerieVonck · 2005-02-14, 19:24

M3321932969 no factor from 2^60 to 2^63.

ET_ · 2005-02-16, 19:46

What should one do if he takes a range, say, from 63 to 66 bits, and finds a factor at 64 bits?

Today we have completed the whole range before quitting, but I must admit that it's going to be time-consuming as our bit level grows up.

Our Italian Billion Project web pages will soon reflect the time spent in the search, so I for myself would complete the whole range, credit it (and have the tiny chance to find another factor), but we should discuss it here and decide together the default behavior.

Any ideas?

Luigi

ValerieVonck · 2005-02-16, 19:50

IMHO, when I find a factor, for let's say 15k or RieselSieve, I think it is removed from the range of LLR. For what purpose do you want to search further if a factor is found?

wblipp · 2005-02-16, 22:59

Personally, I would finish a level only if it's a short time. I'd probably finish any level under 68, but my P-Pro is taking months getting from 72 to 73. If it found a factor now, at 72.8, I would not let it run another six weeks to reach 73.

As for why to continue, the only output from this project is going to contributions to Will Edgington's list of Mersenne factors. If anybody is ever interested in finding factors (as opposed to determining compositeness), then continuing to an even stopping point makes it easier for that person to pick up the work and continue. I ask people if they finished only so that the data will be clean for successors, not to pressure anyone into doing work they don't want to do on a silly pointless project.

ET_ · 2005-02-16, 23:02

Quote:

Originally Posted by CedricVonck

IMHO, when I find a factor, for let's say 15k or RieselSieve, I think it is removed from the range of LLR. For what purpose do you want to search further if a factor is found?

I know Will Edgington collects ALL known factors of Mersenne numbers, not only the first one, and Operation Billion Digits is helping a lot.

Knowing more factors may help the hard work of factoring the number itself. It doesn't apply to today computation, but factors over 55 bits are out of reach of today's ECM factoring technologies, and having them known may help future research more than actual efforts for factorization.

It doesn't cost as much time as ECM, and it's fun.

Thank you for your help.

Luigi

ET_ · 2005-02-16, 23:09

As previously announced, the Italian Web page of Operation Billion Digits has had some restyling. Now you can see detailed statistics about exponents, factors and users' resources.

If you like to give them a look, the address is the following:

http://www.moregimps.it/billion/stats.php

I kindly ask for comments, new ideas, corrections in both functionality and grammar (I'm obviously NOT an English mothertongue).

You can reach me here, PM me or send an email to mc5225 AT mclink dot it.

A new download page with executables for Windows, Linux, BSD and MAC will soon follow: if you want to help compiling new binaries, you are obviously welcome.

Luigi

Uncwilly · 2005-03-04, 23:17

In updatting my spreadsheet I found that I have 2 expos list at a higher level than moregimps.it and one at a much lower level.
...30371 70vs69
...31099 73vs72
...32889 60vs69

Also, I have 219 expos with 124 factored vs 220 and 125 on the .it site. (I will look more into that later.

ET_ · 2005-03-05, 13:53

Quote:

Originally Posted by Uncwilly

In updatting my spreadsheet I found that I have 2 expos list at a higher level than moregimps.it and one at a much lower level.
...30371 70vs69
...31099 73vs72
...32889 60vs69

Also, I have 219 expos with 124 factored vs 220 and 125 on the .it site. (I will look more into that later.

I will update the site, thank you Uncwilly.

As for the 219 vs 220, let me know about it

Luigi

ET_ · 2005-03-05, 14:26

Quote:

Originally Posted by ET_

I will update the site, thank you Uncwilly.

As for the 219 vs 220, let me know about it

Luigi

I was working on the last. Maybe it's done, but it is at the office. I will give you more information as I get there Monday in the morning.

http://www.mersenneforum.org/showpos...5&postcount=51

Do you know who worked the first two from 68 to 69?

Luigi

Uncwilly · 2005-03-07, 21:41

Quote:

Originally Posted by ET_

I will update the site, thank you Uncwilly.

As for the 219 vs 220, let me know about it

Found it, and I verified that there is a factor:
M3321929551 has a factor: 8174238826850191

M3321929531 must have confused me.

I don't record results of who is doing what.... , however I will see if I dig up the data for the first 2 numbers.

2005-02-14, 19:07	#540
ValerieVonck Mar 2004 Belgium 839 Posts	3321932969 from 60 to 63 [Reserved] Can I use P5v246 for offline factoring exponents? Last fiddled with by ValerieVonck on 2005-02-14 at 19:08

2005-02-16, 19:46	#542
ET_ Banned "Luigi" Aug 2002 Team Italia 11272₈ Posts	What if I find a factor before the end of the range? What should one do if he takes a range, say, from 63 to 66 bits, and finds a factor at 64 bits? Today we have completed the whole range before quitting, but I must admit that it's going to be time-consuming as our bit level grows up. Our Italian Billion Project web pages will soon reflect the time spent in the search, so I for myself would complete the whole range, credit it (and have the tiny chance to find another factor), but we should discuss it here and decide together the default behavior. Any ideas? Luigi

2005-02-16, 23:09	#546
ET_ Banned "Luigi" Aug 2002 Team Italia 2×3×17×47 Posts	Operation Billion Digits Stats Page! As previously announced, the Italian Web page of Operation Billion Digits has had some restyling. Now you can see detailed statistics about exponents, factors and users' resources. If you like to give them a look, the address is the following: http://www.moregimps.it/billion/stats.php I kindly ask for comments, new ideas, corrections in both functionality and grammar (I'm obviously NOT an English mothertongue). You can reach me here, PM me or send an email to mc5225 AT mclink dot it. A new download page with executables for Windows, Linux, BSD and MAC will soon follow: if you want to help compiling new binaries, you are obviously welcome. Luigi

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
The "one billion minus 999,994,000" digits prime number	a1call	Miscellaneous Math	179	2015-11-12 14:59
Ten Billion Digits Mersenne Numbers	aketilander	Operation Billion Digits	13	2013-02-03 21:15
Operation Megabit Twin	Oddball	Twin Prime Search	370	2013-01-03 21:26
modulo operation for polynomials?	smslca	Math	3	2011-04-18 17:18
question range 1 billion to 2 billion?	Unregistered	Information & Answers	7	2010-08-12 06:25

2005-02-14, 19:24	#541
ValerieVonck Mar 2004 Belgium 839 Posts	M3321932969 no factor from 2^60 to 2^63.

2005-02-16, 19:50	#543
ValerieVonck Mar 2004 Belgium 839₁₀ Posts	IMHO, when I find a factor, for let's say 15k or RieselSieve, I think it is removed from the range of LLR. For what purpose do you want to search further if a factor is found?

2005-02-16, 22:59	#544
wblipp "William" May 2003 New Haven 2³×5×59 Posts	Personally, I would finish a level only if it's a short time. I'd probably finish any level under 68, but my P-Pro is taking months getting from 72 to 73. If it found a factor now, at 72.8, I would not let it run another six weeks to reach 73. As for why to continue, the only output from this project is going to contributions to Will Edgington's list of Mersenne factors. If anybody is ever interested in finding factors (as opposed to determining compositeness), then continuing to an even stopping point makes it easier for that person to pick up the work and continue. I ask people if they finished only so that the data will be clean for successors, not to pressure anyone into doing work they don't want to do on a silly pointless project.

2005-03-04, 23:17	#547
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 23×401 Posts	In updatting my spreadsheet I found that I have 2 expos list at a higher level than moregimps.it and one at a much lower level. ...30371 70vs69 ...31099 73vs72 ...32889 60vs69 Also, I have 219 expos with 124 factored vs 220 and 125 on the .it site. (I will look more into that later.