20130825, 14:03  #34 
Sep 2008
Kansas
2×31×53 Posts 
c137 @ i2092
I will start sieving soon. Poly almost done.

20130825, 14:29  #35 
"Ed Hall"
Dec 2009
Adirondack Mtns
5×727 Posts 
Code:
Found probable prime factor of 44 digits: 39580242975757113790733052958481530034022517 Last fiddled with by EdH on 20130825 at 14:30 
20130825, 16:04  #36 
Sep 2008
Kansas
2·31·53 Posts 
Yay! Didn't have to sieve it.
A p44, that should have been picked up by yafu because a full t45 would be in order. :/ 
20130825, 16:38  #37 
Sep 2008
Kansas
3286_{10} Posts 
c172 @ i2093
2^3 * 3^2 * 233 * c172
pm1 5e9  nothing 
20130825, 23:37  #38 
Sep 2008
Kansas
2·31·53 Posts 
660 @ 11e6  nothing
520 @ 43e6  nothing Pausing to run a NFS@H job. 
20130826, 15:42  #39 
"Ed Hall"
Dec 2009
Adirondack Mtns
5×727 Posts 
3860@11e6
2000@43e6 600@11e7 
20130827, 00:56  #40 
Sep 2008
Kansas
6326_{8} Posts 
Passing through
220 @ 11e7 This will be slow going. I'm afraid we may end up with two sequences sitting at a C172. 
20130827, 01:12  #41  
"Ed Hall"
Dec 2009
Adirondack Mtns
5×727 Posts 
Quote:
I suppose there are a couple things to consider: 1. The c173 has had a lot of ecm, the latest being 70005@85e7. That means we're closer to finding a record ecm factor for it, but it also means we'd probably need a lot more curves to find it. That number is probably past being ready for gnfs. 2. Truly, I suppose we've only brushed the tip of the c172 with ecm, and shouldn't be looking toward any team sieve for it any time soon. I suppose that leaves working with 3408 for a while... 

20130827, 01:45  #42 
Sep 2008
Kansas
2×31×53 Posts 
Totally agree.
1. 4788 c173 is definitely ready for GNFS. I'm not sure the enthusiasm given the low interest level of these two "relatively" new sequences. 2. We have acres to go into 26e7 before considering GNFS. Hopefully, some factor searching ECMer may come across a nice find. Seq 3408 may be the main focus for the immediate future with some ECM curves on 3366 here or there. BTW, these GNFS projects will require the 15e siever. This is beyond a request to NFS@Home because they have so many in backlog to meet other obligations. 
20130827, 03:51  #43 
"Curtis"
Feb 2005
Riverside, CA
2×2,339 Posts 
Does 15e require 1GB per thread to sieve?
I wish one of these were in the high 160s, as I'd like to participate in a bigish factorization; but 170+ is pretty serious given the interest shown so far. Isn't one of the problems with 4788 interest its driver? I mean, if we do the c173 there's no reason to think we'd go long before another serious roadblock? 
20130827, 08:13  #44  
"Frank <^>"
Dec 2004
CDP Janesville
2122_{10} Posts 
For comparison, I did a c168 at the beginning of the year (running from March thru May).I'm not sure about the memory use, but I think it did seem to run around that rangemaybe 10% higher, but then my sieve machines both have 8GB, so the sievers didn't get in the way.
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