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Old 2011-09-04, 18:46   #1
Oct 2009
Oulu, Finland

2·3·5 Posts
Default Weird factors

Some weeks ago, I factored a few thousand randomly selected 90 digits composites from the factordb. Now I looked into factors.txt and I found some weird results, in example:


I tried look from the factordb how "main composite" is constructed, I clicked "more information" and "is factor of" link until there is no more "is factor of" links.

One example:

Composite I factored:
Main composite: C110,

I can see, that there is lot of sequential zeros in this main composite, but I can't see where it comes.

Any ideas?

60 weird factors in attachment.
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File Type: txt weird.txt (3.3 KB, 123 views)
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Old 2011-09-04, 20:33   #2
kar_bon's Avatar
Mar 2006

32×52×13 Posts

cmd has filled in thousands of factors from such sequences in the FactorDB.
See his posts.... ähm... better his pictures... you will find much examples in there.

PS: See like here

Last fiddled with by kar_bon on 2011-09-04 at 20:39
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Old 2011-09-05, 00:26   #3
cmd's Avatar
Nov 2008

33·37 Posts

free_dd M_it

add ... doubles hump in front ...

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Last fiddled with by cmd on 2011-09-05 at 00:35
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Old 2011-11-01, 23:25   #4
SarK0Y's Avatar
Jan 2010

2·43 Posts

Originally Posted by rekcahx View Post
Some weeks ago, I factored a few thousand randomly selected 90 digits
perhaps, random generator makes tricks, try another one. some generators can be doctored to produce weak RSA numbers
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