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 2010-11-08, 03:22 #1 sinide   Nov 2010 5 Posts who can help me factor this 155 digits number i have a 155 digits big number,my pc is too poor, who can help me to factor it ?
 2010-11-08, 04:29 #2 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 22·32·7·37 Posts Do you feel comfortable asking for a couple hundred dollars from some total strangers? ...because that's what you're doing
 2010-11-08, 07:46 #3 sinide   Nov 2010 5 Posts my pc is very poor, if i factor using GNFS, it will last very long !
2010-11-08, 08:37   #4
schickel

"Frank <^>"
Dec 2004
CDP Janesville

2·1,061 Posts

Quote:
 Originally Posted by sinide my pc is very poor, if i factor using GNFS, it will last very long !
Mine too! But if something is important enough to me, I will put the time needed into it.

Factoring that number might become important to me for, say, $2000 US. How's that sound? Then I could buy a couple of nice quad-cores to factor it for you.  2010-11-08, 08:56 #5 retina Undefined "The unspeakable one" Jun 2006 My evil lair 35·52 Posts Okay, I'll play. I'll do it for$1999.99
 2010-11-08, 09:12 #6 em99010pepe     Sep 2004 283010 Posts Define poor.
2010-11-08, 12:42   #7
lorgix

Sep 2010
Scandinavia

3×5×41 Posts

Quote:
 Originally Posted by sinide i have a 155 digits big number,my pc is too poor, who can help me to factor it ?
Ok, on one condition;

That you correctly guess the second largest factor of the number.

2010-11-08, 14:47   #8
xilman
Bamboozled!

"𒉺𒌌𒇷𒆷𒀭"
May 2003
Down not across

3×3,529 Posts

Quote:
 Originally Posted by sinide i have a 155 digits big number,my pc is too poor, who can help me to factor it ?
Post the number and tell me why you want its factors and I'll consider it.

Paul

2010-11-08, 14:54   #9
R.D. Silverman

Nov 2003

22·5·373 Posts

Quote:
 Originally Posted by xilman Post the number and tell me why you want its factors and I'll consider it. Paul
My guess is that he is trying to break someone's 512-bit RSA key.

2010-11-08, 19:33   #10
CRGreathouse

Aug 2006

22×1,493 Posts

Quote:
 Originally Posted by R.D. Silverman My guess is that he is trying to break someone's 512-bit RSA key.
No doubt.

 2010-11-08, 23:27 #11 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 934010 Posts This is at least the 6th such thread: recent/un-registered, asking to factor a >120 digit number, and 'knowing' it is composite. Last fiddled with by Uncwilly on 2010-11-08 at 23:27

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