20130312, 03:40  #1 
Bemusing Prompter
"Danny"
Dec 2002
California
29×79 Posts 
A B.Cereus case of assignment poaching...
I requested 50 assignments via GPU to 72 last week, and completed them today. However, one of the results was rejected:
Code:
[Sat Mar 09 09:33:49 2013] UID: ixfd64/andromeda, M61578079 has a factor: 8520992029041896962793 [TF:72:73*:mfaktc 0.20 barrett76_mul32_gs] [Sat Mar 09 09:33:49 2013] UID: ixfd64/andromeda, found 1 factor for M61578079 from 2^72 to 2^73 (partially tested) [mfaktc 0.20 barrett76_mul32_gs] [Sat Mar 09 11:54:58 2013] The 30day expiration has supposedly been disabled, so there shouldn't be any assignment overlap. I looked up the exponent on http://mersenne.ca and noticed that someone by the name of "Just factoring!" had already submitted the factor. According to the top producers list, this user has only "completed" 28 TF assignments. It's not really a big deal because 1) the factor would have taken just a few minutes to turn up, 2) GPU to 72 still credits me as the discoverer and 3) I could easily get a load of "successes" credited to my name if I wanted to. That having been said, I'd still like to know what happened. Has "Just factoring!" discovered a new integer factorization algorithm? Or perhaps he wasn't aware of GPU to 72, and decided to randomly pick exponents to TF? Anyone have an idea? Last fiddled with by ixfd64 on 20130312 at 03:43 
20130312, 03:59  #2 
Aug 2012
New Hampshire
2×401 Posts 
two days ago someone else alerted us to "just factoring". I don't recall reading a conclusion.
But you have confirmed the poaching. Accidental or not... 
20130312, 05:12  #3 
"Mike"
Aug 2002
7,573 Posts 
What if they only poach exponents with factors?

20130312, 05:47  #4 
"Kieren"
Jul 2011
In My Own Galaxy!
9923_{10} Posts 

20130312, 06:27  #5 
Dec 2009
Peine, Germany
331 Posts 
rofl

20130312, 06:31  #6 
Apr 2010
Over the rainbow
2365_{10} Posts 
maybe s/he took a bunch of expo, ran one or two bitlevel and returned only the one with a factor?

20130312, 07:44  #7 
"Kieren"
Jul 2011
In My Own Galaxy!
23303_{8} Posts 

20130312, 12:33  #8  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2^{4}×523 Posts 
Quote:


20130312, 14:28  #9 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
3×5×17^{2} Posts 
His/her YTD TF: 28 Attempts; 1 Factor.
Not a big player (yet?) And not just factors 
20130312, 17:53  #10 
Jan 2013
2^{2}·7 Posts 
Here's someone (else?) who has racked up 3200 GHzdays in the last 2 weeks, most of it by manual testing: tomtr.
I came across this as an TF result was rejected. The assignment was given on March 10 and completed on March 11. Last fiddled with by tcharron on 20130312 at 17:54 
20130312, 17:59  #11  
If I May
"Chris Halsall"
Sep 2002
Barbados
2×5×911 Posts 
Quote:
It's not a good idea to reveal the exponent while you work it, but many of us are very interested in documenting poachers.... 

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