Thanks for the encouragement!

Next on the chopping block is the c196. Sadly, it's ~3 weeks out. Will be trying more ECM as well (everyone else is encouraged to join the fun)...

[CODE]Fri Jul 8 17:43:53 2016 Msieve v. 1.52 (SVN 946M)
Fri Jul 8 17:43:53 2016 random seeds: 0a188ba8 6dd0187c
Fri Jul 8 17:43:53 2016 factoring 3251956794251635584858770076674957041300989096969044373660943707751109534665398232497519823473784262817149466557698710896409624274012434026784305056103790457975802019272021739096822542612279790457 (196 digits)
Fri Jul 8 17:43:55 2016 no P-1/P+1/ECM available, skipping
Fri Jul 8 17:43:55 2016 commencing number field sieve (196-digit input)
Fri Jul 8 17:43:55 2016 R0: -64137566177911881690421574407466019560
Fri Jul 8 17:43:55 2016 R1: 727175989402432419719
Fri Jul 8 17:43:55 2016 A0: 1768948024037777665563910534370782842512322150183
Fri Jul 8 17:43:55 2016 A1: 8335094363288858313022666746568929678549
Fri Jul 8 17:43:55 2016 A2: -123227375356498122313841442153326
Fri Jul 8 17:43:55 2016 A3: -613241637371315309035511
Fri Jul 8 17:43:55 2016 A4: -4490534929749039
Fri Jul 8 17:43:55 2016 A5: 2996280
Fri Jul 8 17:43:55 2016 skew 274991827.91, size 2.163e-19, alpha -7.491, combined = 6.523e-15 rroots = 3
Fri Jul 8 17:43:55 2016
Fri Jul 8 17:43:55 2016 commencing linear algebra
Fri Jul 8 17:43:58 2016 read 26344411 cycles
Fri Jul 8 17:44:59 2016 cycles contain 75574890 unique relations
Fri Jul 8 18:19:58 2016 read 75574890 relations
Fri Jul 8 18:22:40 2016 using 20 quadratic characters above 2147483588
Fri Jul 8 18:29:39 2016 building initial matrix
Fri Jul 8 19:05:17 2016 memory use: 11333.9 MB
Fri Jul 8 19:05:36 2016 read 26344411 cycles
Fri Jul 8 19:05:43 2016 matrix is 26344234 x 26344411 (12938.4 MB) with weight 3926785557 (149.06/col)
Fri Jul 8 19:05:43 2016 sparse part has weight 3075593670 (116.75/col)
Fri Jul 8 19:14:31 2016 filtering completed in 2 passes
Fri Jul 8 19:14:40 2016 matrix is 26343908 x 26344085 (12938.4 MB) with weight 3926771948 (149.06/col)
Fri Jul 8 19:14:40 2016 sparse part has weight 3075590362 (116.75/col)
Fri Jul 8 19:18:39 2016 matrix starts at (0, 0)
Fri Jul 8 19:18:46 2016 matrix is 26343908 x 26344085 (12938.4 MB) with weight 3926771948 (149.06/col)
Fri Jul 8 19:18:46 2016 sparse part has weight 3075590362 (116.75/col)
Fri Jul 8 19:18:46 2016 saving the first 48 matrix rows for later
Fri Jul 8 19:18:53 2016 matrix includes 64 packed rows
Fri Jul 8 19:18:58 2016 matrix is 26343860 x 26344085 (12630.6 MB) with weight 3386735376 (128.56/col)
Fri Jul 8 19:18:58 2016 sparse part has weight 3047583162 (115.68/col)
Fri Jul 8 19:18:59 2016 using block size 8192 and superblock size 4423680 for processor cache size 46080 kB
Fri Jul 8 19:22:41 2016 commencing Lanczos iteration (48 threads)
Fri Jul 8 19:22:41 2016 memory use: 10791.0 MB
Fri Jul 8 19:24:25 2016 linear algebra at 0.0%, ETA 483h38m
Fri Jul 8 19:24:59 2016 checkpointing every 60000 dimensions[/CODE]

Ah, my bad. The ETA has dropped quite a bit since I last looked at the log; now we're "only" looking at ~350 hours.

Never mind -- no need to wait 2-3 weeks!

[CODE]********** Factor found in step 2: 1273604103225614062909453491814449846298546658892526619568821267
Found probable prime factor of 64 digits: 1273604103225614062909453491814449846298546658892526619568821267
Probable prime cofactor 2553349809423128060012020374518094250855378311437407502435268764170442261890999277388715539273676476814574884150293437717652172741571 has 133 digits[/CODE]

I would like to send a big shout out to everyone here past and present that helped advance 4788 from where we picked it up to to where it is today.

Looking back at the first message in the thread, the group effort started with i2350 at a height of 144 digits. I certainly never anticipated that we would ever be able to make it to 200 digits, let alone have the good fortune to have the dowdriver turn up at this height. And all this in just a little over 7 years. Awesome!

[QUOTE=schickel;437872]Awesome![/QUOTE]
Thanks :smile:
Beautiful graphic too... it looks exactly like peeing in the wind.. :razz:
(from the origin of the graphic)

ETA ~48 hours until the next c190 blocker (1026547506...41) factors. Hold on to your butts...

c190 finished early -- a nice surprise!

[CODE]Tue Jul 19 17:26:00 2016 initial square root is modulo 17809651
Tue Jul 19 18:35:44 2016 sqrtTime: 9825
Tue Jul 19 18:35:44 2016 prp73 factor: 5075495827594259675270324339868085923458528157347661981228767241468163243
Tue Jul 19 18:35:44 2016 prp117 factor: 202255610303506276501165500260439988798020126551334405304978150438566798840510521458561879903531800206392835464611187[/CODE]

[QUOTE=ryanp;438443]c190 finished early -- a nice surprise![/QUOTE]

Well done! Now a 196-digit blocker - ugh!

[QUOTE=Prime95;438480]Well done! Now a 196-digit blocker - ugh![/QUOTE]
And it's survived quite a bit of ECM so far... throwing some more at it before going to GNFS.

We are now at ~24 hours until LA finishes for the c196 blocker, so hopefully we'll have the factors Tuesday morning or afternoon.

Well, you only need to get it about ~25 digits down...
Then we can handle it :razz:
[COLOR=White](Good job, btw!)[/COLOR]