Factorizations of repunit numbers of the form (10n-1)/9 (111111...)

Related links:



ECM EFFORTS
with Rn:      323 < n < 2000 (Nov 18, 2018) with Rn:     1999 < n < 3000 (Oct 12, 2018)
with Rn:     2999 < n < 4000 (Oct 12, 2018) with Rn:     3999 < n < 5000 (Oct 15, 2017)
with Rn:     4999 < n < 6000 (Nov 15, 2018) with Rn:     5999 < n < 7000 (Sep 03, 2018)
with Rn:     6999 < n < 8000 (Oct 16, 2017) with Rn:     7999 < n < 9000 (Aug 14, 2018)
with Rn:     8999 < n <10000 (Aug 14, 2018) with Rn:     9999 < n <11000 (Sep 17, 2017)
with Rn:   10999 < n <12000 (Oct 04, 2017) with Rn:   11999 < n <12501 (Oct 05, 2017)




Efforts by   yoyo@home:    ecm-curves
B1 = 43e6/8600 curves/
numbers < 1001 digits
953
working
955
working
959
working
961
working
965
working
B1 = 11e7/18400 curves/
numbers < 701 digits
875
working
879
working
895
working
1202
working
1208
working
B1 = 26e7/46000 curves/
numbers < 450 digits
437
working
1136
working
1142
working
1160
working
2380M
working
B1 = 85e7/75000 curves/
numbers < 250 digits
515
working
585
working
609
working
2420L
working
2460L
working



News
-  Last update: Nov 18, 2018

-  Bo Chen, Wenjie Fang, Alfred Eichhorn, Danilo Nitsche, Kurt Beschorner 
   Nov 18, 2018   n = 447:  171965701068496883745528184125987011516361211819168507125947606393599406276344599684907; SNFS                      

Sat Oct 06 04:58:46 2018  Msieve v. 1.54 (SVN 1018)
Sat Oct 06 04:58:46 2018  random seeds: e3918a68 32ce80a5
Sat Oct 06 04:58:46 2018  factoring 69321014077064724019571549358862835996841447139912495343062967983949554947479478571581383734991370175536866202887278999373991988107804240628646717482866215329222782659915672388735946673582832868303624397508087015243244997035632300227764933519 (242 digits)
Sat Oct 06 04:58:47 2018  searching for 15-digit factors
Sat Oct 06 04:58:48 2018  commencing number field sieve (242-digit input)
Sat Oct 06 04:58:48 2018  R0: -100000000000000000000000000000000000000000000000000
Sat Oct 06 04:58:48 2018  R1: 1
Sat Oct 06 04:58:48 2018  A0: 100
Sat Oct 06 04:58:48 2018  A1: 0
Sat Oct 06 04:58:48 2018  A2: 0
Sat Oct 06 04:58:48 2018  A3: 10
Sat Oct 06 04:58:48 2018  A4: 0
Sat Oct 06 04:58:48 2018  A5: 0
Sat Oct 06 04:58:48 2018  A6: 1
Sat Oct 06 04:58:48 2018  skew 2.95, size 1.246e-014, alpha -0.127, combined = 3.929e-015 rroots = 0
Sat Oct 06 04:58:48 2018  commencing relation filtering
Sat Oct 06 04:58:48 2018  setting target matrix density to 120.0
Sat Oct 06 04:58:48 2018  estimated available RAM is 65214.1 MB
Sat Oct 06 04:58:48 2018  commencing duplicate removal, pass 1
Sat Oct 06 04:59:37 2018  error -9 reading relation 4525107
...
Sat Oct 06 07:17:12 2018  skipped 20467 relations with b > 2^32
Sat Oct 06 07:17:12 2018  skipped 495 relations with composite factors
Sat Oct 06 07:17:12 2018  found 117072180 hash collisions in 755265371 relations
Sat Oct 06 07:17:23 2018  added 1 free relations
Sat Oct 06 07:17:23 2018  commencing duplicate removal, pass 2
Sat Oct 06 07:29:27 2018  found 25043240 duplicates and 730222132 unique relations
Sat Oct 06 07:29:27 2018  memory use: 4518.0 MB
Sat Oct 06 07:29:28 2018  reading ideals above 431030272
Sat Oct 06 07:29:28 2018  commencing singleton removal, initial pass
Sat Oct 06 09:29:40 2018  memory use: 11024.0 MB
Sat Oct 06 09:29:41 2018  reading all ideals from disk
Sat Oct 06 09:29:51 2018  memory use: 13762.1 MB
Sat Oct 06 09:31:03 2018  commencing in-memory singleton removal
Sat Oct 06 09:32:11 2018  begin with 730222132 relations and 624045914 unique ideals
Sat Oct 06 09:51:04 2018  reduce to 488536219 relations and 359290715 ideals in 16 passes
Sat Oct 06 09:51:04 2018  max relations containing the same ideal: 31
Sat Oct 06 09:52:11 2018  reading ideals above 720000
Sat Oct 06 09:52:13 2018  commencing singleton removal, initial pass
Sat Oct 06 11:48:09 2018  memory use: 11024.0 MB
Sat Oct 06 11:48:10 2018  reading all ideals from disk
Sat Oct 06 11:48:29 2018  memory use: 22023.2 MB
Sat Oct 06 11:50:26 2018  keeping 402483262 ideals with weight <= 200, target excess is 2607065
...
Sat Oct 06 21:45:43 2018  commencing in-memory singleton removal
Sat Oct 06 21:46:04 2018  begin with 141745329 relations and 142664143 unique ideals
Sat Oct 06 21:49:15 2018  reduce to 141616321 relations and 138591294 ideals in 7 passes
Sat Oct 06 21:49:15 2018  max relations containing the same ideal: 96
Sat Oct 06 21:51:39 2018  relations with 0 large ideals: 65943
Sat Oct 06 21:51:39 2018  relations with 1 large ideals: 30581
Sat Oct 06 21:51:39 2018  relations with 2 large ideals: 455061
Sat Oct 06 21:51:39 2018  relations with 3 large ideals: 3079754
Sat Oct 06 21:51:39 2018  relations with 4 large ideals: 11406833
Sat Oct 06 21:51:39 2018  relations with 5 large ideals: 25593658
Sat Oct 06 21:51:39 2018  relations with 6 large ideals: 36492971
Sat Oct 06 21:51:39 2018  relations with 7+ large ideals: 64491520
Sat Oct 06 21:51:39 2018  commencing 2-way merge
Sat Oct 06 21:54:38 2018  reduce to 90132240 relation sets and 87107213 unique ideals
Sat Oct 06 21:54:38 2018  commencing full merge
Sat Oct 06 22:56:57 2018  memory use: 11212.0 MB
Sat Oct 06 22:57:37 2018  found 41059399 cycles, need 40763413
Sat Oct 06 22:57:41 2018  weight of 40763413 cycles is about 4892357921 (120.02/cycle)
Sat Oct 06 22:57:41 2018  distribution of cycle lengths:
Sat Oct 06 22:57:41 2018  1 relations: 2860257
Sat Oct 06 22:57:41 2018  2 relations: 2953546
Sat Oct 06 22:57:41 2018  3 relations: 3046688
Sat Oct 06 22:57:41 2018  4 relations: 3036747
Sat Oct 06 22:57:41 2018  5 relations: 3030362
Sat Oct 06 22:57:41 2018  6 relations: 2980876
Sat Oct 06 22:57:41 2018  7 relations: 2881308
Sat Oct 06 22:57:41 2018  8 relations: 2760500
Sat Oct 06 22:57:41 2018  9 relations: 2588644
Sat Oct 06 22:57:41 2018  10+ relations: 14624485
Sat Oct 06 22:57:41 2018  heaviest cycle: 28 relations
Sat Oct 06 23:03:14 2018  commencing cycle optimization
Sat Oct 06 23:05:57 2018  start with 331593529 relations
Sat Oct 06 23:32:38 2018  pruned 13563958 relations
Sat Oct 06 23:32:38 2018  memory use: 9231.7 MB
Sat Oct 06 23:32:38 2018  distribution of cycle lengths:
Sat Oct 06 23:32:39 2018  1 relations: 2860257
Sat Oct 06 23:32:39 2018  2 relations: 3026923
Sat Oct 06 23:32:39 2018  3 relations: 3173026
Sat Oct 06 23:32:39 2018  4 relations: 3153050
Sat Oct 06 23:32:39 2018  5 relations: 3168168
Sat Oct 06 23:32:39 2018  6 relations: 3105685
Sat Oct 06 23:32:39 2018  7 relations: 3013415
Sat Oct 06 23:32:39 2018  8 relations: 2871297
Sat Oct 06 23:32:39 2018  9 relations: 2688554
Sat Oct 06 23:32:39 2018  10+ relations: 13703038
Sat Oct 06 23:32:39 2018  heaviest cycle: 28 relations
Sat Oct 06 23:39:30 2018  RelProcTime: 67242
Sat Oct 06 23:39:30 2018  
Sat Oct 06 23:39:30 2018  commencing linear algebra
Sat Oct 06 23:39:55 2018  read 40763413 cycles
Sat Oct 06 23:42:46 2018  cycles contain 140036147 unique relations
Sun Oct 07 00:04:43 2018  read 140036147 relations
Sun Oct 07 00:13:03 2018  using 20 quadratic characters above 4294917295
Sun Oct 07 00:24:18 2018  building initial matrix
Sun Oct 07 01:26:49 2018  memory use: 18710.3 MB
Sun Oct 07 01:29:40 2018  read 40763413 cycles
Sun Oct 07 01:29:52 2018  matrix is 40763236 x 40763413 (19269.0 MB) with weight 5597046678 (137.31/col)
Sun Oct 07 01:29:52 2018  sparse part has weight 4602849360 (112.92/col)
Sun Oct 07 01:44:03 2018  filtering completed in 2 passes
Sun Oct 07 01:44:14 2018  matrix is 40761323 x 40761500 (19268.8 MB) with weight 5596979276 (137.31/col)
Sun Oct 07 01:44:14 2018  sparse part has weight 4602828028 (112.92/col)
Sun Oct 07 01:51:44 2018  matrix starts at (0, 0)
Sun Oct 07 01:51:55 2018  matrix is 40761323 x 40761500 (19268.8 MB) with weight 5596979276 (137.31/col)
Sun Oct 07 01:51:55 2018  sparse part has weight 4602828028 (112.92/col)
Sun Oct 07 01:51:55 2018  saving the first 48 matrix rows for later
Sun Oct 07 01:52:16 2018  matrix includes 64 packed rows
Sun Oct 07 01:52:26 2018  matrix is 40761275 x 40761500 (18644.3 MB) with weight 4828877229 (118.47/col)
Sun Oct 07 01:52:26 2018  sparse part has weight 4479876000 (109.90/col)
Sun Oct 07 01:52:26 2018  using block size 8192 and superblock size 1081344 for processor cache size 11264 kB
Sun Oct 07 02:00:28 2018  commencing Lanczos iteration (16 threads)
Sun Oct 07 02:00:28 2018  memory use: 16396.0 MB
Sun Oct 07 02:03:00 2018  linear algebra at 0.0%, ETA 1071h55m
Sun Oct 07 02:03:48 2018  checkpointing every 40000 dimensions
Sun Nov 18 01:26:31 2018  lanczos halted after 644592 iterations (dim = 40761273)
Sun Nov 18 01:27:22 2018  recovered 39 nontrivial dependencies
Sun Nov 18 01:31:06 2018  BLanczosTime: 3639096
Sun Nov 18 01:31:06 2018  
Sun Nov 18 01:31:06 2018  commencing square root phase
Sun Nov 18 01:31:06 2018  handling dependencies 1 to 64
Sun Nov 18 01:31:06 2018  reading relations for dependency 1
Sun Nov 18 01:31:29 2018  read 20383058 cycles
Sun Nov 18 01:32:52 2018  cycles contain 70029230 unique relations
Sun Nov 18 01:49:39 2018  read 70029230 relations
Sun Nov 18 02:02:40 2018  multiplying 70029230 relations
Sun Nov 18 03:46:23 2018  multiply complete, coefficients have about 1982.47 million bits
Sun Nov 18 03:46:32 2018  initial square root is modulo 781234637
Sun Nov 18 05:25:03 2018  sqrtTime: 14037
Sun Nov 18 05:25:03 2018  p87 factor: 171965701068496883745528184125987011516361211819168507125947606393599406276344599684907
Sun Nov 18 05:25:03 2018  p156 factor: 403109536647967823252626198527435162419900299742827908005840017638975777612947999010862228355924998943486126966926981706492404007923365680835642750113174317
Sun Nov 18 05:25:03 2018  elapsed time 1033:26:17


-  Bo Chen, Wenjie Fang, Alfred Eichhorn, Danilo Nitsche, Kurt Beschorner 
   Nov 18, 2018   R507, c200, GNFS: the R507-polynom was created by Makzym Voznyy in cooperation with mersenneforum - thanks!
                  143M unique relations and 319M unique ideals are collected
                  currently progress ~ 19.5%:    
                  

-  Found by Kurt Beschorner 
   Aug 14, 2018   n = 5763: 284156578135574224432914847837;                        B1= 1e6;  sigma = 3029120048

   Sep 18, 2018   n = 5769: 498268955994589849741317466453;                        B1= 1e6;  sigma = 3296470939

   Nov 15, 2018   n = 5799: 407616517564686763737328159;                           B1= 1e6;  sigma = 196829594


-  Found by Alfred Eichhorn 
   Aug 03, 2018   n =24499: 18174893231459131283319569 * 6113439550......c24473;    B1=5e4;  sigma = 8634299472218058874

   Aug 16, 2018   n =24767: 335279891709129662539397 * 7376413727......c24719;      B1=5e4;  sigma = 18035853098425951272

   Aug 16, 2018   n =50129: 6289652660414968016773 * 1766569906......c50107;        B1=5e4;  sigma = 9173810817472448840

   Aug 24, 2018   n =24859: 732758049762982336409489 * 1516341050......c24835;      B1=5e4;  sigma = 13838281173430418896 

   Sep 14, 2018   n =25033: 26379408690395699720505923 * 4212039489......c25007;    B1=5e4;  sigma = 17699047658806986723

   Sep 14, 2018   n =50147: 84543021478589310587493493 * 1314255265......c50121;    B1=5e4;  sigma = 5370675363275971662

   Sep 22, 2018   n =25037: 811768176143826688793987 * 1368754213......c25013;      B1=5e4;  sigma = 11091549647073987954

   Oct 01, 2018   n =82189: 238414930357117293855839 * 4660409100 ......c82165;     B1=11e3; sigma = 562165524379139051

   Oct 30, 2018   n =83023: 500264093290976080733 * 2221049093......c83002;         B1=11e3; sigma = 11937734603016540001   

   Nov 11, 2018   n =25537: 1259296913639166167562326419639 * 8823265578......c25506; B1=5e4; sigma = 14892534724291470304
   
   Nov 11, 2018   n =83257: 59227921609062585437 * 1875992067......c83237;          B1=11e3; sigma = 17579053699389191557

   Nov 11, 2018   n =83299: 893226768070010831 * 1160078125......c83264;            B1=11e3; sigma = 11086780502315832603

   Nov 11, 2018   n =83311: 3481979901988725361079 * 3191032522......c83289;        B1=11e3; sigma = 6240338475624733737
   

-  Found by Alfred Reich 
   Aug 25, 2018   n = 2000: 2918934658137053157142763595766996896001;              B1= 8e7;  sigma= 1:422066992


-  Found by  Sam Wagstaff
   Jun 30, 2018   n =  776: 89889606269073901082901578436277965983883967076039535258233; ecm


-  Found by YOYO@home 
-  YOYO@home/NeuralMiner
   Jul 04, 2018   n = 1319: 14390577104652629414853222197261272650807833666740820489; B1= 11e6; sigma = 0:9515467317591503677

-  YOYO@home/Deltik
   Jul 26, 2018   n =5660M: 1369840259774549318827876634983169895121;              B1= 11e6; sigma = 0:8001543717994501796

-  YOYO@home/Danny
   Aug 15, 2018   n = 937:  829044297281482845905510544752736064447147;            B1= 43e6; sigma = 0:17347482564892651207

-  YOYO@home/Danny
   Aug 16, 2018   n = 941:  2416277668973171349313713089855425966192452863373961;  B1= 43e6; sigma = 0:8598628182170899200

-  YOYO@home/biodoc
   Aug 24, 2018   n =5860L: 2837267642075799218843167929960912181;                 B1= 11e6; sigma = 0:4074972538232797766

-  YOYO@home/Deltik
   Sep 05, 2018   n = 947:  48654367388531252592760353317455806428703907;          B1= 43e6; sigma = 0:3047487473098335725

-  YOYO@home/CCPLogibro
   Sep 15, 2018   n =1225:  148034167812084215700206443550170966001;               B1= 43e6; sigma = 0:671077335727112008

-  YOYO@home/pi
   Sep 17, 2018   n =5900M: 593243597135622945022444401922545308692618865123732027101; B1= 11e6; sigma = 0:12823567598948732363

-  YOYO@home/Loaded
   Sep 18, 2018   n =1202:  12319072731805329005802468132076248505842564849805129; B1= 11e7; sigma = 0:14036092255227619769

-  YOYO@home/Lennox84
   Sep 19, 2018   n = 463:  212135711098934921098108241314382773839707263659206851643; B1= 26e7; sigma = 0:18442255449381683540



Factorizations
Repunits: R1        - R2500 (Nov 18, 2018) Repunits:  R2501 - R5000 (Sep 28, 2018)
Repunits: R5001   - R7500 (Nov 15, 2018) Repunits: R7501 - R10000 (Feb 11, 2018)
Repunits: R10001 - R12500 (Sep 30, 2017) Repunits: R12540LM - R14980LM (Sep 30, 2017)


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