Linear algebra reservations, progress and results

[pinhodecarlos]

Reserving L2755A when available. Will need someone to send me a win 64 binary since I’m not sure if I have the latest version.

[RichD]

501M total relations/398M unique was used to build a 24.3M matrix, requesting TD=132.
Solve time about 420 hours, -t 4.

p55 factor: 9335256927304324781867730055279178196446953731117328411
p191 factor: 21663546907306770483956941414215251553788396915307636994102769182692371757788881938933268519179000603055272957228376664559928060436425937057304523809847397680652880876500565700259357374265509

https://pastebin.com/dRNr6cXG

[RichD]

Taking C231_144_110 next.

[Dubslow]

commencing linear algebra  
read 12514646 cycles
cycles contain 41790561 unique relations
read 41790561 relations
using 20 quadratic characters above 4294917295
building initial matrix
memory use: 5266.4 MB
read 12514646 cycles
matrix is 12514469 x 12514646 (5096.0 MB) with weight 1468869279 (117.37/col)
sparse part has weight 1198218592 (95.75/col)
filtering completed in 2 passes
matrix is 12513950 x 12514127 (5095.9 MB) with weight 1468853493 (117.38/col)
sparse part has weight 1198214436 (95.75/col)
matrix starts at (0, 0)
matrix is 12513950 x 12514127 (5095.9 MB) with weight 1468853493 (117.38/col)
sparse part has weight 1198214436 (95.75/col)
saving the first 48 matrix rows for later
matrix includes 64 packed rows
matrix is 12513902 x 12514127 (4855.1 MB) with weight 1239548299 (99.05/col)
sparse part has weight 1147602637 (91.70/col)
using block size 8192 and superblock size 589824 for processor cache size 6144 kB
commencing Lanczos iteration (4 threads)
memory use: 4126.0 MB
linear algebra at 0.0%, ETA 280h15m514127 dimensions (0.0%, ETA 280h15m)
checkpointing every 50000 dimensions14127 dimensions (0.0%, ETA 280h27m)
linear algebra completed 12513808 of 12514127 dimensions (100.0%, ETA 0h 0m)
lanczos halted after 197895 iterations (dim = 12513902)
recovered 41 nontrivial dependencies
BLanczosTime: 1010136

commencing square root phase
handling dependencies 1 to 64
reading relations for dependency 1
read 6254619 cycles
cycles contain 20887806 unique relations
read 20887806 relations
multiplying 20887806 relations
multiply complete, coefficients have about 764.10 million bits
initial square root is modulo 7164127
sqrtTime: 5179
p84 factor: 592254853555140943579004974125223855774137298906730841909358626033326595711481949953
p126 factor: 963456245318775067655122957159891633252456580739394726896066302899962248831628798865538579294891399664250006238031589500896513
elapsed time 283:57:07

https://pastebin.com/c242YBZw

I will take C231_135_73

[unconnected]

C175_11040_10071 completed - 50.5 hours for 10.7M matrix (TD=130).

prp82 factor: 2243225575528994208815293521186068501511492769689603643063216856924059755963278611
prp94 factor: 2890788176206451647820625394864409534647054602995263485221250309659087337821927649060709105903

https://pastebin.com/WJuJcqBm

[swellman]

Taking C232_140_59 for postprocessing.

[pinhodecarlos]

Originally Posted by pinhodecarlos

Reserving L2755A when available. Will need someone to send me a win 64 binary since I’m not sure if I have the latest version.

Probably still premature but I think you will need to extend the sieve range for the composite, am I right?

In the meantime I’ve requested Jeff if he would compile msieve taking advantage of large vectors for linear algebra phase as per this thread: http://www.mersenneforum.org/showthread.php?t=22386

[Xyzzy]

We give up.

This job is cursed.

Thu Jan 11 19:18:04 2018  commencing Lanczos iteration
Thu Jan 11 19:18:04 2018  memory use: 6034.5 MB
Thu Jan 11 19:24:24 2018  linear algebra at 0.0%, ETA 1535h 4m
Thu Jan 11 19:26:26 2018  checkpointing every 20000 dimensions
Sun Jan 14 15:06:22 2018  lanczos error: submatrix is not invertible
Sun Jan 14 15:06:22 2018  lanczos halted after 16518 iterations (dim = 1044540)
Sun Jan 14 15:06:22 2018  linear algebra failed; retrying...

[swellman]

I ran this last week for a day or so - if no one objects I can continue the job to completion or until confirmation of Mike’s results is achieved. Give me a couple of days to get it restarted.

[swellman]

Originally Posted by swellman

Reserving C231_143_54 for postprocessing, thank you.

Factored.

p57 factor: 302036817350916621903118688577670776833671599786371358197
p175 factor: 2056323524521771142852917589674084239994692615944175278685769037807636794472617851339521605874409372964087306290511408533694056163187105290088074671977999568266864460887368087

257894115 raw / 199101121 unique

Built an 11M x 11M matrix @TD=124, log attached.

[pinhodecarlos]

Originally Posted by pinhodecarlos

Reserving L2755A when available. Will need someone to send me a win 64 binary since I’m not sure if I have the latest version.

Is the poly correct for this number? I can't seem to start msieve.

N 1092559077365581738715807574118148964598762940778747564887555152368371595212669276890941987750881124330289151107183543420219009090837539006652634722149159073406315629808714513076855131
R0 818706854228831001753880637535093596811413714795418360007
R1 -2143402371193585144275731144820024112622791843221056597232
SKEW 1
A4 1
A3 -1
A2 6
A1 -6
A0 11
SRLPMAX 2147483648
SALPMAX 2147483648
FAMAX 268000000
FRMAX 268000000

Thu Jan 18 19:34:41 2018  
Thu Jan 18 19:34:41 2018  
Thu Jan 18 19:34:41 2018  Msieve v. 1.53 (SVN unknown)
Thu Jan 18 19:34:41 2018  random seeds: 0ca93eac fb29b08b
Thu Jan 18 19:34:41 2018  factoring 1092559077365581738715807574118148964598762940778747564887555152368371595212669276890941987750881124330289151107183543420219009090837539006652634722149159073406315629808714513076855131 (184 digits)
Thu Jan 18 19:34:43 2018  searching for 15-digit factors
Thu Jan 18 19:34:45 2018  commencing number field sieve (184-digit input)
Thu Jan 18 19:34:45 2018  error: polynomial is missing or corrupt