20120325, 13:41  #1 
Mar 2012
2 Posts 
today ,i factoring rsa512 is ok,only 3 day
i factoring rsa512 only 3 day,but install sw sppend 7 day.

20120325, 23:10  #2 
"Daniel Jackson"
May 2011
14285714285714285714
2^{6}×11 Posts 
Are you trying to factor a 512bit RSA number in 3 days? You would need at least 122 CPU cores to do that (for a 1 week factorization, you would need at least 53 CPU cores). If you want it factored fast, google RSALS and when you find the site (Should be the 1st link), contact them with a request. That's how the C166 from 10^4551 was factored within a few weeks. Wait for quantum PC's and you should be able to factor 10^86753091 within a few CPU years. Who knows. We may find a ploynomialtime algorithm for nonquantum computers. It's possible.
It's best to start at 384bit RSA keys and try factoring those first. Last fiddled with by Stargate38 on 20120325 at 23:17 
20120325, 23:13  #3 
Aug 2010
Kansas
547 Posts 
English translation
I believe the OP is trying to say "I am factoring RSA512 today with an estimated run time of 3 days, but installing the software took seven days."
My analysis of this translation suggests that he is complaining and/or looking for sympathy. Let me check... Nope, not here. Last fiddled with by ewmayer on 20120326 at 01:53 Reason: inappropriate racialstereotype comment removed 
20120326, 01:06  #4 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3×29×83 Posts 
While clocker wasn't very polite about it, the point is, original poster, that you need to improve your English. You could try wordreference.com, translate.google.com, or a whole host of other websites that do similar translation things. You could also post what you meant to say in your native language, and the rest of us ought to be able to figure it out.

20120326, 01:09  #5 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
83·127 Posts 

20120326, 05:39  #6 
Sep 2009
1722_{8} Posts 
At the end of the factorization work for TIZ80 and TI68k RSA512 public keys, with external postprocessing help, RSALS could indeed factor such keys in <5 days, despite doing the work more than twice (we had let the quorum to 2  results wouldn't be accepted unless there were two bitidentical outputs !).
After that, RSALS factored two 512bit RSA public keys (for a community with the same goal we had on TIZ80 and TI68k calculators, namely the 3DO console programming community), but that was more than two years ago. Since then, we've refused to factor several other RSA512 keys, because: * the increase in computational power has made the sieving and postprocessing work even easier than it used to be (in 2009, ~73 days on a single, aging dualcore computer  RSALS was created for streamlining the process and factoring everything in a short period of time, hopefully before TI struck with some thoroughly illegal legal attacks  which they did, see see https://www.eff.org/press/archives/2009/10/13 , https://www.eff.org/deeplinks/2009/0...osekidsalone and https://www.eff.org/deeplinks/2009/1...diggingholes ); * setting up the software is, in fact, not that hard, in our experience: dozens of us used an older, factMsieve.plbased version of http://gilchrist.ca/jeff/factoring/n...ers_guide.html before RSALS was created; and nowadays, people can also use e.g. the readymade framework described at http://www.mersenneforum.org/showthread.php?t=16114 . 
20120413, 07:22  #7  
Mar 2012
2 Posts 
Quote:
factor a 512bit RSA is easy,i factorization 3 units N. We do not have a quantum computer, the first phase of the GPU, 580 graphics card, only need 10 hours, has been a very good E value 3.6, the second stage, we use 17 sets of ordinary dualcore computer, plus two sets ofthe Inter 3930 cpu computers, plus a two CPU, 12 nuclear, 24thread server, of about 33 hours, ran out of more than 5700 million in relation to the third stage, we use the Inter 3930 cpu computer, used for treatment of 9 hours or so. 

20120413, 17:57  #8 
(loop (#_fork))
Feb 2006
Cambridge, England
6453_{10} Posts 
You are working with fairly old figures; the seven 155digit numbers I've factored in the last couple of years have taken an average of 2100 CPUhours for the sieving, the linear algebra would be around 12 hours on 24 cores of a 48core K10 machine.

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