20151024, 11:39  #188 
Jun 2012
2960_{10} Posts 
Just over 1200 additional curves so far with no factor found. Full t50 should finish by Sunday night. Or I can shift to B1=110M for 12k additional curves.
Or maybe it's time to abandon ECM? Your call. For now I'll just carry on towards t50 unless you say otherwise.  Sean 
20151024, 17:22  #189 
"Curtis"
Feb 2005
Riverside, CA
3^{3}×173 Posts 
How about a couple hundred at 110M, and call it good tonight? I'll start NFS Sun morning USA time.
Edit anything above half a T50 is sufficient. I didn't calculate how much has been done; if we're past 0.5*T50, no more is needed. Last fiddled with by VBCurtis on 20151024 at 17:28 
20151024, 20:25  #190 
Jun 2012
101110010000_{2} Posts 
So far, ECM has run ~2300 additional curves @B1=43M. In a couple of hours I will kick it up to B1=110M and let it run overnight. I'm on the east coast and have an early start tomorrow, so I can post yea or nay on any factors being found before you start NFS.
Does this work for you? I believe that will push it to well past 0.5t50 and provide sufficient due diligence to avoid a blatant ECM miss. Last fiddled with by swellman on 20151024 at 20:31 
20151024, 20:28  #191 
"Curtis"
Feb 2005
Riverside, CA
3^{3}·173 Posts 
That's terrific, thanks for the extra effort. I'll testsieve today, and will be ready to fire NFS when I wake up tomorrow.
I haven't previously tried running my full desktop on a single NFS task. Going to try 12threaded sieving on a 6core i7. Hopefully, I'll have factors in under a week! 
20151024, 20:39  #192 
Jun 2012
2^{4}×5×37 Posts 

20151024, 22:07  #193 
"Curtis"
Feb 2005
Riverside, CA
1001000111111_{2} Posts 
Rich's 2nd poly sieves about 15% faster than the first, with yield also higher.
I used alim=rlim=33M, 31bit LP, 2 large primes per side. I testsieved at alim/6, alim/3, alim/2, alim, a range of 1500q each (long enough for sec/rel to stabilize to two sigfigs) Yield was bad at alim/6, so I will start the run at alim/4 (and with alim 35M instead of 33). Yields at the other test points were roughly the same, around 4.5. For 140M raw relations, that's a range of about 32Mq, roughly q = 9M to 41M. 
20151024, 23:36  #194 
Jun 2012
B90_{16} Posts 
Ran ECM up to 2680 additional curves @B1=43M, plus the 1550 curves run earlier = 4230 curves, or ~55% of t50.
Now running more curves with B1=110M. Getting throughput of ~66 curves/hr. Should have >700 curves by morning. I'll post the results about 6 AM EDT. 
20151025, 10:23  #195 
Jun 2012
2^{4}·5·37 Posts 
Ran another 760 curves @B1=110M with nothing found. Terminated ECM.
It belongs to NFS now. Happy factoring! 
20151028, 12:35  #196  
Jun 2012
2^{4}×5×37 Posts 
Quote:


20151028, 22:01  #197 
"Curtis"
Feb 2005
Riverside, CA
4671_{10} Posts 
79 hrs wallclock time, 78.3M relations of estimated 143M raw rels needed. If a matrix builds the first try, that'll make nearly exactly 6 days sieve time.
There is a single thread of srsieve running, so NFS has 12/13ths of the CPU. I doubt the matrix will solve in under 24 hr, so it will take me more than a week to factor. :( Last fiddled with by VBCurtis on 20151028 at 22:02 
20151029, 02:13  #198 
Jun 2012
2^{4}·5·37 Posts 
89 days for a 157 GNFS? Not too shabby for a single machine! Let's hope this sequence starts moving downward.
I'm willing to throw some more ECM into the mix if needed later. Just call for help here. Good luck! 
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