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 2020-11-21, 16:06 #507 Alfred     May 2013 Germany 79 Posts p54 with ecm and B1 = 3e6 Caught this p54 while searching for a brilliant 199-digit number. Code: Input number is 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999992027 (199 digits) Using B1=3000000-3000000, B2=5706890290, polynomial Dickson(6), sigma=3:1452677002 Step 1 took 0ms Step 2 took 2813ms ********** Factor found in step 2: 423160190219167918418888831508389397512846550243914177 Found prime factor of 54 digits: 423160190219167918418888831508389397512846550243914177 Prime cofactor 23631712602314236460375363605669880057528256019179586483958332029245798546518655036308640681338947369725232833261868840557864887635516265827697051 has 146 digits
 2021-01-03, 00:20 #508 fivemack (loop (#_fork))     Feb 2006 Cambridge, England 6,379 Posts L1513 finished 202-digit GNFS done locally Code: Tue Aug 4 13:05:29 2020 R0: -1028224595046037683938542391736748085046 Tue Aug 4 13:05:29 2020 R1: 4848130132767804170091793 Tue Aug 4 13:05:29 2020 A0: 648878061894436523327775882840696551093747592165 Tue Aug 4 13:05:29 2020 A1: 13245849346295954315426797465107710625703 Tue Aug 4 13:05:29 2020 A2: -376642136328230129661761611055571 Tue Aug 4 13:05:29 2020 A3: -9454281508658701649335711 Tue Aug 4 13:05:29 2020 A4: 116526330703266438 Tue Aug 4 13:05:29 2020 A5: 428485680 Tue Aug 4 13:05:29 2020 skew 67545908.29, size 5.912e-20, alpha -8.299, combined = 2.961e-15 rroots = 3 ... sieve Q=40M..375M in 1078087489 thread-seconds ... Sat Nov 21 21:26:59 2020 matrix is 63151125 x 63151542 (22228.8 MB) with weight 5094240601 (80.67/col) Sat Nov 21 21:26:59 2020 sparse part has weight 4816732203 (76.27/col) Fri Jan 1 15:23:55 2021 lanczos halted after 247423 iterations (dim = 63151125) Sat Jan 2 20:57:21 2021 p70 factor: 4493695606770472637867321927044598060152799561314346673366564420496931 Sat Jan 2 20:57:21 2021 p133 factor: 2148834568682702094964376360162085149774220051591587827359563815630236626372124575110661016995807683695989368484857539018308408221331

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