ECM results and reservations - Page 23

swellman · 2016-06-13, 18:58

Reserving C202_148_51 for ECM to t50. Thanks.

swellman · 2016-06-14, 11:00

Quote:

Originally Posted by swellman

Reserving C216_148_124 for ECM to t50. Thanks.

Survived 7600 curves @B1=43e6 with no factors found. Releasing.

fivemack · 2016-06-14, 20:21

Completed 20384 curves at B1=3e8 B2=(default)3,178,599,824,416 on C284_135_127 without finding a factor. A month on GTX970 GPU plus 3640 core-hours on 1.9GHz K10 for the second stage.

swellman · 2016-06-20, 23:21

Ryan got an ECM hit on C211_124_123.

Code:

********** Factor found in step 2:
118314624380529436124079132557161014946144045550567209
Found probable prime factor of 54 digits:
118314624380529436124079132557161014946144045550567209
Probable prime cofactor
33117699689866932824111276418243148068302935889705971739241326921762271413101433256820408446792269647804331615013042661364350549753936087907258547006614925727
has 158 digits

swellman · 2016-06-21, 00:17

Ryan factored C195_130_89 by ECM.

Code:

********** Factor found in step 2:
210145143353423511145553933910048410754900979593529072169
Found probable prime factor of 57 digits:
210145143353423511145553933910048410754900979593529072169
Probable prime cofactor
3439992121273464754082235191387598633161885418721268821127178782598931540570712548565769414556470953130881398909270392418211540184650340451
has 139 digits

XYYXF · 2016-06-21, 00:54

Is there a sigma value available? And B1 of course :)

swellman · 2016-06-21, 01:28

Quote:

Originally Posted by XYYXF

Is there a sigma value available? And B1 of course :)

For the C195: Using B1=850000000, B2=15892628251516, polynomial
Dickson(30), sigma=1062194790

For the C211: Using B1=850000000, B2=15892628251516, polynomial
Dickson(30), sigma=1220436528

XYYXF · 2016-06-21, 01:32

Thanks a lot!

Going to update the pages today.

swellman · 2016-06-21, 16:58

Ryan cracked it with ECM. p55*p128

Code:

Using B1=850000000, B2=15892628251516, polynomial
Dickson(30), sigma=4290294976

swellman · 2016-06-21, 21:28

Ryan found a factor via ECM.

Code:

********** Factor found in step 2:
22187314689020234193745365940248168577045908632927261
Found probable prime factor of 53 digits:
22187314689020234193745365940248168577045908632927261
Probable prime cofactor
7725756604334386753610135955163628925664634344296169849192582590604449039564288856272159883175214561466089333931370601092730555397144963270283
has 142 digits

Using B1=850000000, B2=15892628251516, polynomial Dickson(30), sigma=977100270

XYYXF · 2016-06-21, 22:06

Oops, that one will be utilized in the next update :)

http://www.primefan.ru/xyyxf/results.html#0

2016-06-14, 20:21	#245
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 1913₁₆ Posts	Completed 20384 curves at B1=3e8 B2=(default)3,178,599,824,416 on C284_135_127 without finding a factor. A month on GTX970 GPU plus 3640 core-hours on 1.9GHz K10 for the second stage. Last fiddled with by fivemack on 2016-06-14 at 20:24

2016-06-21, 00:54	#248
XYYXF Jan 2005 Minsk, Belarus 400₁₀ Posts	Is there a sigma value available? And B1 of course :) Last fiddled with by XYYXF on 2016-06-21 at 00:58

2016-06-21, 16:58	#251
swellman Jun 2012 2²×13×59 Posts	C183_134_69 Factored Ryan cracked it with ECM. p55*p128 Code: Using B1=850000000, B2=15892628251516, polynomial Dickson(30), sigma=4290294976

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2016-06-13, 18:58	#243
swellman Jun 2012 2²·13·59 Posts	Reserving C202_148_51 for ECM to t50. Thanks.

2016-06-21, 01:32	#250
XYYXF Jan 2005 Minsk, Belarus 2⁴·5² Posts	Thanks a lot! Going to update the pages today.

2016-06-21, 22:06	#253
XYYXF Jan 2005 Minsk, Belarus 2⁴·5² Posts	Oops, that one will be utilized in the next update :) http://www.primefan.ru/xyyxf/results.html#0