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Old 2021-10-15, 17:03   #3136
ryanp
 
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Quote:
Originally Posted by EdH View Post
t50 completed on c187. Returning it to the Team. . .
Got a nice ECM hit:

Code:
GMP-ECM 7.0.5-dev [configured with GMP 6.2.0, GWNUM 30.4, --enable-asm-redc, --enable-assert] [ECM]
Due to incompatible licenses, this binary file must not be distributed.
Input number is 4276613063712577368288081530739263591499089531813322097225127270222273056912626535597839021815912255438970339609557004085494461513626726552563672414910189269704371033032701991682419832147 (187 digits)
Using B1=850000000, B2=15892628251516, polynomial Dickson(30), sigma=1:3081933653
Step 1 took 2094947ms
Step 2 took 503428ms
********** Factor found in step 2: 170637095614559495626472650841173273394976891446968003800528921837984319
Found prime factor of 72 digits: 170637095614559495626472650841173273394976891446968003800528921837984319
Prime cofactor 25062622217696010935394754634200029729816076320687547031252020375807414664369152943984086331891536127598793264044013 has 116 digits

Last fiddled with by ryanp on 2021-10-15 at 17:25
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Old 2021-10-16, 10:13   #3137
SethTro
 
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p72 is a nice factor Ryan!


I finished a t45 on the c158, I'm running t50 now, and will factor it with CADO overnight if I don't find a factor.
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Old 2021-10-20, 19:47   #3138
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I've hit the c186 blocker @i12601 with a fair bit of ECM, but it didn't crack. Running GNFS on it now.
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Old 2021-10-21, 22:20   #3139
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I'm now the second person to know that the C158 factors as

235135428415733585976439325229520790520225044469128317898640986440315363425440537 *193342839483052979098666287649581036752342433417784528705948363890824381981587

CADO log from the job

https://pastebin.com/3XKCNAxr
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Old 2021-10-22, 01:45   #3140
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On the current blocker:

Code:
Fri Oct 22 00:23:35 2021  Msieve v. 1.54 (SVN Unversioned directory)
Fri Oct 22 00:23:35 2021  random seeds: 5cea0abd 0b0b70d1
Fri Oct 22 00:23:35 2021  factoring 555958432502795536088243164830775698917032751414518213911278171078047388114270579974159891342877028645125852716894998202908925879207990171621524796676210279452917835825942186976047219757 (186 digits)
Fri Oct 22 00:23:36 2021  no P-1/P+1/ECM available, skipping
Fri Oct 22 00:23:36 2021  commencing number field sieve (186-digit input)
Fri Oct 22 00:23:36 2021  R0: -945617671864395719846538528725581745
Fri Oct 22 00:23:36 2021  R1: 929931709079663768101
Fri Oct 22 00:23:36 2021  A0: -8772287074681587792891229961468094852568656
Fri Oct 22 00:23:36 2021  A1: 323562416604841464967297736760232146
Fri Oct 22 00:23:36 2021  A2: 277422772718715127786474098251
Fri Oct 22 00:23:36 2021  A3: -901626220424877727177
Fri Oct 22 00:23:36 2021  A4: -492746228506694
Fri Oct 22 00:23:36 2021  A5: 1470600
Fri Oct 22 00:23:36 2021  skew 1.00, size 3.410e-18, alpha -6.359, combined = 1.531e-16 rroots = 5
Fri Oct 22 00:23:36 2021  
Fri Oct 22 00:23:36 2021  commencing linear algebra
Fri Oct 22 00:23:36 2021  using VBITS=128
Fri Oct 22 00:23:40 2021  read 30734747 cycles
Fri Oct 22 00:25:04 2021  cycles contain 103545122 unique relations
Fri Oct 22 00:31:43 2021  read 103545122 relations
Fri Oct 22 00:35:03 2021  using 20 quadratic characters above 4294917295
Fri Oct 22 00:44:20 2021  building initial matrix
Fri Oct 22 01:10:22 2021  memory use: 14734.4 MB
Fri Oct 22 01:10:39 2021  read 30734747 cycles
Fri Oct 22 01:10:45 2021  matrix is 30734569 x 30734747 (15552.1 MB) with weight 4703455832 (153.03/col)
Fri Oct 22 01:10:45 2021  sparse part has weight 3708075492 (120.65/col)
Fri Oct 22 01:21:13 2021  filtering completed in 2 passes
Fri Oct 22 01:21:20 2021  matrix is 30733618 x 30733796 (15552.0 MB) with weight 4703413066 (153.04/col)
Fri Oct 22 01:21:20 2021  sparse part has weight 3708063906 (120.65/col)
Fri Oct 22 01:24:50 2021  matrix starts at (0, 0)
Fri Oct 22 01:24:55 2021  matrix is 30733618 x 30733796 (15552.0 MB) with weight 4703413066 (153.04/col)
Fri Oct 22 01:24:55 2021  sparse part has weight 3708063906 (120.65/col)
Fri Oct 22 01:24:55 2021  saving the first 112 matrix rows for later
Fri Oct 22 01:25:02 2021  matrix includes 128 packed rows
Fri Oct 22 01:25:10 2021  matrix is 30733506 x 30733796 (14426.1 MB) with weight 3658634078 (119.04/col)
Fri Oct 22 01:25:10 2021  sparse part has weight 3412922188 (111.05/col)
Fri Oct 22 01:25:11 2021  using GPU 0 (NVIDIA A100-SXM4-40GB)
Fri Oct 22 01:25:11 2021  selected card has CUDA arch 8.0
Fri Oct 22 01:30:54 2021  commencing Lanczos iteration
Fri Oct 22 01:30:56 2021  memory use: 30728.1 MB
Fri Oct 22 01:31:02 2021  linear algebra at 0.0%, ETA 27h56m
Fri Oct 22 01:31:03 2021  checkpointing every 1230000 dimensions
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Old 2021-10-22, 05:54   #3141
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Try using VBITS=384 (or 256 if 384 uses too much memory). It should be a bit faster.
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Old 2021-10-22, 13:36   #3142
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Quote:
Originally Posted by frmky View Post
Try using VBITS=384 (or 256 if 384 uses too much memory). It should be a bit faster.
Thanks -- good to know for the future, though I probably won't restart this job now. (I asked over in the msieve LA thread how to determine reasonable values for VBITS and block_nzz, other than "trial and error" )
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Old 2021-10-23, 13:54   #3143
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Got a few more terms done. Unfortunately, looks like there's a 2^2 · 3^3 · 7 now. Working on ECM for the c196 @i12606.
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Old 2021-11-05, 19:01   #3144
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I am working on the c196 at index 12606 now.
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Old 2021-11-11, 04:30   #3145
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Quote:
Originally Posted by ryanp View Post
I am working on the c196 at index 12606 now.
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Old 2021-11-11, 11:16   #3146
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I've added few iterations, now C156@i12609, t40 was done on it.

Last fiddled with by unconnected on 2021-11-11 at 11:16
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