mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > Operation Billion Digits

Reply
 
Thread Tools
Old 2004-12-29, 05:37   #529
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

8,423 Posts
Default

Yes it will continue until the bit level is reached.

That is why on some of the expos you see that 3 factors are found and the expo was only taken to 48 bits.

You could manually stop it if you wished.
Uncwilly is offline   Reply With Quote
Old 2004-12-30, 00:09   #530
wakko
 
Nov 2004

2·5 Posts
Default Defective hardware

Hello there hunters,

About a couple of months ago, I made my first try in _Billon Digit_, by trying to factor the Mersenne with the exponent << 3321930173 >>.

Well I am here again to inform you that I abandon the exponent because _Prime95_ torture test claims that my hardware is defective. That result came after running the test twice for about 20 hours.

Should I abandon the project completely?? I used to run _factor32_ for about 10 hours a day...
wakko is offline   Reply With Quote
Old 2004-12-31, 11:10   #531
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

11×433 Posts
Default

Quote:
Originally Posted by wakko
Hello there hunters,

About a couple of months ago, I made my first try in _Billon Digit_, by trying to factor the Mersenne with the exponent << 3321930173 >>.

Well I am here again to inform you that I abandon the exponent because _Prime95_ torture test claims that my hardware is defective. That result came after running the test twice for about 20 hours.

Should I abandon the project completely?? I used to run _factor32_ for about 10 hours a day...
Prime95 is hard coded in assembly and requires that the machine is perfectly tuned up, while factor3_2 is coded in C with some subroutines in assembly, and usually doesn't bother about some slight hardware problems.

I think you can go on with Project Billion Digits with no problems.

Luigi
ET_ is online now   Reply With Quote
Old 2005-02-12, 17:59   #532
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

129B16 Posts
Default

I made some statistics over the project, and am proud to announce that Project Billion Digits passed over 1000 P90 CPU hours

I will soon show this one and many more stats about the project and its partecipants on a new stats page.

Luigi
ET_ is online now   Reply With Quote
Old 2005-02-13, 04:40   #533
wblipp
 
wblipp's Avatar
 
"William"
May 2003
New Haven

44668 Posts
Default

I opened the next range of exponents today.

http://ElevenSmooth.com/Billion.html

William
wblipp is offline   Reply With Quote
Old 2005-02-13, 09:43   #534
Jwb52z
 
Jwb52z's Avatar
 
Sep 2002

32·5·17 Posts
Default

Just for the sake of neatness, how about moving all the exponents that have had factors found for them to a separate table or a separate page. That table is going to get very long if you keep all of them mixed together.
Jwb52z is offline   Reply With Quote
Old 2005-02-13, 12:05   #535
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

10010100110112 Posts
Default

Quote:
Originally Posted by Jwb52z
Just for the sake of neatness, how about moving all the exponents that have had factors found for them to a separate table or a separate page. That table is going to get very long if you keep all of them mixed together.
I am working on this subject

I hope that you''ll have different tables before the end of next week.

Luigi
ET_ is online now   Reply With Quote
Old 2005-02-14, 04:43   #536
HiddenWarrior
 
HiddenWarrior's Avatar
 
Jun 2003
Russia, Novosibirsk

21410 Posts
Default

Hello, ET!
1. I just want to ask if there will be a kind of factors and nofactor files of Billion Digits project? It will help me a lot to add BDP support to MPA program.
2. Factor_3_2 doesn't stop working over exponent when finding factor. Is there a way to stop when factor found and to move to next expo?
3. I factor some expo from 1 to 50 bit, and the found factor ouputs to be 50.191 bit... Is this becouse of rounding of calculations of something else?

Thanx
HiddenWarrior is offline   Reply With Quote
Old 2005-02-14, 14:25   #537
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

11×433 Posts
Default

Quote:
Originally Posted by HiddenWarrior
Hello, ET!
1. I just want to ask if there will be a kind of factors and nofactor files of Billion Digits project? It will help me a lot to add BDP support to MPA program.
2. Factor_3_2 doesn't stop working over exponent when finding factor. Is there a way to stop when factor found and to move to next expo?
3. I factor some expo from 1 to 50 bit, and the found factor ouputs to be 50.191 bit... Is this becouse of rounding of calculations of something else?

Thanx
Here I am!

1 - Not exactly: you will have a web page where you can sort out factored and non-factored exponents, as well as factors and who found them.
Anyway, it may be a feature to put on my to-do list.

2 - It doesn't stop until it reaches the final bit length. This is why some exponents have more than one factor found.

3 - The program runs until d=2kp+1 reaches or passes the stop-bit limit. As the check is done on d, the reached bit depth may be slightly over the stop-bit one.

4 - There will be a new feature on version 3.3 that speeds up the search. I'm still working on it.

Thank you for your interest, feel free to write to me anytime you like.

Luigi
ET_ is online now   Reply With Quote
Old 2005-02-14, 17:31   #538
HiddenWarrior
 
HiddenWarrior's Avatar
 
Jun 2003
Russia, Novosibirsk

2×107 Posts
Default

Ok! Thanx for inforamtion. I also noticed that batch version doesn't cleare already worked exponents from input.txt. Is there a way to restart testing from the place last session ended? I saw status.txt which holds some data about last worked points...
HiddenWarrior is offline   Reply With Quote
Old 2005-02-14, 19:04   #539
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

11×433 Posts
Default

Quote:
Originally Posted by HiddenWarrior
Ok! Thanx for inforamtion. I also noticed that batch version doesn't cleare already worked exponents from input.txt. Is there a way to restart testing from the place last session ended? I saw status.txt which holds some data about last worked points...
Did you try restarting it with the "-r" switch?

Luigi
ET_ is online now   Reply With Quote
Reply

Thread Tools


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

All times are UTC. The time now is 12:27.

Thu Aug 13 12:27:45 UTC 2020 up 9:03, 1 user, load averages: 1.31, 1.54, 1.59

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, 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.