ECM results and reservations - Page 25

swellman · 2016-08-23, 15:44

Quote:

Originally Posted by swellman

Reserving C230_149_106 for ECM to t50.

Survived 7600 curves @B1=43e6. Releasing.

swellman · 2016-09-01, 15:20

http://factordb.com/index.php?id=1000000000044746152

Sorry I didn't reserve it - he was too quick!

Code:

GMP-ECM 6.4.4 [configured with GMP 6.0.0, --enable-asm-redc] [ECM]
Input number is
34577319614301949072226953733076740960028533352717779631632823963537012692759168035110629333557256976716309275984192092520826858616921456630178475830426918177713734504997772576829301136420735961745516889747
(206 digits)
Using MODMULN [mulredc:0, sqrredc:2]
Using B1=850000000, B2=15892628251516, polynomial Dickson(30), sigma=2560958095
dF=524288, k=5, d=5705700, d2=17, i0=132
Expected number of curves to find a factor of n digits:
35      40      45      50      55      60      65      70      75      80
15      47      168     661     2867    13623   69471   381778  2221086 1.4e+07
Step 1 took 4501488ms
Using 25 small primes for NTT
Estimated memory usage: 2365M
Initializing tables of differences for F took 4726ms
Computing roots of F took 70808ms
Building F from its roots took 39526ms
Computing 1/F took 15008ms
Initializing table of differences for G took 501ms
Computing roots of G took 60290ms
Building G from its roots took 43940ms
Computing roots of G took 59098ms
Building G from its roots took 44625ms
Computing G * H took 7966ms
Reducing  G * H mod F took 8431ms
Computing roots of G took 60668ms
Building G from its roots took 44693ms
Computing G * H took 8179ms
Reducing  G * H mod F took 8181ms
Computing roots of G took 59786ms
Building G from its roots took 43479ms
Computing G * H took 8006ms
Reducing  G * H mod F took 8297ms
Computing roots of G took 60568ms
Building G from its roots took 44684ms
Computing G * H took 8281ms
Reducing  G * H mod F took 8469ms
Computing polyeval(F,G) took 76523ms
Computing product of all F(g_i) took 303ms
Step 2 took 797585ms
********** Factor found in step 2:
508030470176711645980438714506206430031991945361861580531
Found probable prime factor of 57 digits:
508030470176711645980438714506206430031991945361861580531

fivemack · 2016-09-11, 10:44

I just noticed that I forgot to look at the log files properly for C200_139_113

It is now fully factored:

Code:

-rw-rw-r-- 1 driver driver 50602 Aug 30 14:30 /home/nfsworld/XYYXF/139.113.e/X08/xaf.s2

Resuming ECM residue saved by pumpkin@pumpkin with GMP-ECM 7.0.4-dev on Tue Aug 23 03:37:12 2016 
Input number is 43083799152135331267335113025253722564325494880350443825084369839588656763691829705291873665259394367002381807367554752803746000845172841142500162985075503053421570820224466034106747921674543904908321 (200 digits)
Using B1=300000000-300000000, B2=3299108824840, polynomial Dickson(30), sigma=3:1095877588
Step 1 took 1ms
Step 2 took 710164ms
********** Factor found in step 2: 291290712147810660576816305207371715184951008952889589
Found prime factor of 54 digits: 291290712147810660576816305207371715184951008952889589
Prime cofactor 147906532393223608896484321599614967734218866291734315801956453590386102142676753091461574009839754044383182944268595956539274874847533751639784189 has 147 digits

swellman · 2016-10-03, 23:48

Reserving C286_149_93 for ECM but using a strategy suggested by the Baysian analysis tool. Wombatman will run a series of increasing B1 (Stage 1). I'll run Stage 2. Curve count follows.

2300 @B1=110e6
5300 @B1=850e6
~800 @B1=2.9e9

Really hoping we get a hit. NFS will not be pretty!

fivemack · 2016-10-06, 07:44

C190_147_80 succumbed to ECM: http://mersenneforum.org/showpost.ph...&postcount=153

swellman · 2016-10-20, 19:15

Reserving the C134 stub remaining when yoyo found a p55 factor for C188_121_115. Thanks.

swellman · 2016-10-23, 18:36

Reserving C296_149_100 for ECM to t55.

swellman · 2016-11-08, 02:00

Reserving C297_146_121 with wombatman for full ECM using Bayesian approach.

swellman · 2016-11-13, 01:05

Quote:

Originally Posted by swellman

Reserving C296_149_100 for ECM to t55.

Ran 11,000 curves @B1=11e7 but have now stopped. We may revisit ECM of this number in the near future using Bayesian methods but I wanted to document the progress to date.

swellman · 2016-12-07, 23:13

Running some ECM on C202_140_102 towards a partial t55, in preparation for NFS@Home.

swellman · 2017-01-05, 01:37

C286_149_93 was run through the following

2800 curves @ B1=11e7 - Completed
5400 curves @ B1=85e7 - Completed

Ready for NFS per the Bayesian tool. Not sure if this NFS job is within any individual's resources or it would require a 16e effort by NFS@Home/Ryan/etc.

Anyway, ECM is complete.

2016-10-03, 23:48	#268
swellman Jun 2012 2²×13×59 Posts	C286_149_93 Reserving C286_149_93 for ECM but using a strategy suggested by the Baysian analysis tool. Wombatman will run a series of increasing B1 (Stage 1). I'll run Stage 2. Curve count follows. 2300 @B1=110e6 5300 @B1=850e6 ~800 @B1=2.9e9 Really hoping we get a hit. NFS will not be pretty! Last fiddled with by swellman on 2016-10-04 at 00:13 Reason: correction to B1

2016-10-23, 18:36	#271
swellman Jun 2012 101111111100₂ Posts	C296_149_100 Reserving C296_149_100 for ECM to t55.

2016-11-08, 02:00	#272
swellman Jun 2012 2²×13×59 Posts	C297_146_121 Reserving C297_146_121 with wombatman for full ECM using Bayesian approach.

2016-12-07, 23:13	#274
swellman Jun 2012 2²×13×59 Posts	C202_140_102 ECM Running some ECM on C202_140_102 towards a partial t55, in preparation for NFS@Home.

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2016-10-06, 07:44	#269
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 14423₈ Posts	C190_147_80 succumbed to ECM: http://mersenneforum.org/showpost.ph...&postcount=153

2016-10-20, 19:15	#270
swellman Jun 2012 5774₈ Posts	Reserving the C134 stub remaining when yoyo found a p55 factor for C188_121_115. Thanks.

2017-01-05, 01:37	#275
swellman Jun 2012 2²·13·59 Posts	C286_149_93 was run through the following 2800 curves @ B1=11e7 - Completed 5400 curves @ B1=85e7 - Completed Ready for NFS per the Bayesian tool. Not sure if this NFS job is within any individual's resources or it would require a 16e effort by NFS@Home/Ryan/etc. Anyway, ECM is complete.