2801^79-1 reservations (CLOSED 27 AUGUST) - Page 7

apocalypse · 2010-08-31, 08:02

248M-252M Complete. 5419978 relations in the range, 5408212 unique. Uploading now.

Andi47 · 2010-09-01, 20:06

Quote:

Originally Posted by Andi47

It seems that my run has crashed during my holiday:

206-207 is ~25% done
207-208 seems almost done.

I will upload what I have tonight or tomorrow evening.

uploaded:

206-207 (or ~25% of it because it has crashed): http://www.sendspace.com/file/32x18n
207-208 (should be (almost?) complete): http://www.sendspace.com/file/vn7xbe

fivemack · 2010-09-01, 20:22

207-208 appears complete; 206-207 is indeed 25% done.

I'll finish up 206-207 and 19.0-19.8, and start the linear algebra at the weekend.

chris2be8 · 2010-09-02, 16:39

I think we can un-sticky this thread now.

Chris K

fivemack · 2010-09-04, 07:46

15-252 is now fully sieved, msieve with target density 100 is poring through 47492098338 bytes of relations (407997768 relations, 318653904 unique)

fivemack · 2010-09-04, 14:59

Code:

Sat Sep  4 14:53:53 2010  matrix is 19514425 x 19514673 (7528.6 MB) with weight 1925523041 (98.67/col)
Sat Sep  4 14:53:53 2010  sparse part has weight 1778442998 (91.13/col)
Sat Sep  4 14:59:46 2010  linear algebra at 0.0%, ETA 865h14m

linear algebra completed 22997 of 19514673 dimensions (0.1%, ETA 869h28m)    

10131 nfsslave  20   0 8496m 8.3g 1048 R  343 70.3 609:04.83 msieve

Should be done in about five weeks

fivemack · 2010-10-07, 09:10

Unfortunately, the timing has not worked out perfectly: the linalg would finish on Saturday afternoon, but I am going to China for two weeks on Saturday morning and will turn the computers off. So expect factors on about 26 October.

fivemack · 2010-10-27, 21:27

Code:

Wed Oct 27 12:00:11 2010  prp85 factor: 8022468609453611665082019221530953944163549137920344510245747854780835146671963776777
Wed Oct 27 12:00:11 2010  prp184 factor: 9688789919483838708810358343444188308059016146046561072836401903385375007156741636000015490808770627835181274383093018972359887003518258190829470483941361347766634033284584062134510727

(from the fifth dependency, at eight hours per sqrt)

About 835 wall-time hours on four cores of i7 to do the linear algebra.

Batalov · 2010-10-27, 22:31

Congrats! That was some heavy-lifting!

debrouxl · 2010-10-28, 08:05

Great, congratulations

wblipp · 2010-11-06, 11:36

Wow! This was a BIG project that I had not expected to see this year. Oddperfect.org had been advancing ECM on this most-limiting obstruction, but mostly in hope of finding a factor. The base 2801 isn't of interest outside of the OPN community, and the number strains resources. But in April Tom grabbed the bull by the horns and said "let's do it!" Nearly six months later, with huge contributions by dozens of people, it's finished.

Thanks, Tom, and all the other contributors. There are ways to push OPN proofs higher without specific factorizations, but the result is always a higher limit that is constrained by the same missing factorization. This factorization would have determined the limitation of all OPN proofs - all OPN researchers rejoice at this factorization.

2010-09-04, 07:46	#71
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 18EB₁₆ Posts	And they're off 15-252 is now fully sieved, msieve with target density 100 is poring through 47492098338 bytes of relations (407997768 relations, 318653904 unique) Last fiddled with by fivemack on 2010-09-04 at 09:15

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2010-08-31, 08:02	#67
apocalypse Feb 2003 10101110₂ Posts	248M-252M Complete. 5419978 relations in the range, 5408212 unique. Uploading now.

2010-09-01, 20:22	#69
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 6,379 Posts	207-208 appears complete; 206-207 is indeed 25% done. I'll finish up 206-207 and 19.0-19.8, and start the linear algebra at the weekend.

2010-09-02, 16:39	#70
chris2be8 Sep 2009 2²×3²×5×11 Posts	I think we can un-sticky this thread now. Chris K

2010-10-07, 09:10	#73
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 1100011101011₂ Posts	Unfortunately, the timing has not worked out perfectly: the linalg would finish on Saturday afternoon, but I am going to China for two weeks on Saturday morning and will turn the computers off. So expect factors on about 26 October.

2010-10-27, 22:31	#75
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3³×7³ Posts	Congrats! That was some heavy-lifting!

2010-10-28, 08:05	#76
debrouxl Sep 2009 977 Posts	Great, congratulations

2010-11-06, 11:36	#77
wblipp "William" May 2003 New Haven 4470₈ Posts	Wow! This was a BIG project that I had not expected to see this year. Oddperfect.org had been advancing ECM on this most-limiting obstruction, but mostly in hope of finding a factor. The base 2801 isn't of interest outside of the OPN community, and the number strains resources. But in April Tom grabbed the bull by the horns and said "let's do it!" Nearly six months later, with huge contributions by dozens of people, it's finished. Thanks, Tom, and all the other contributors. There are ways to push OPN proofs higher without specific factorizations, but the result is always a higher limit that is constrained by the same missing factorization. This factorization would have determined the limitation of all OPN proofs - all OPN researchers rejoice at this factorization.