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 2014-09-27, 05:54 #177 Wick   Nov 2012 23×32 Posts Code: 598303^37-1 = 141564506618597953495404322578758873 * 173425382715900890478296318934217175388753709373685646269492132615005032816072482289330396161230911051852245406229724365723342162440733310274475448137984220934029716303
 2014-10-12, 09:32 #178 Wick   Nov 2012 23·32 Posts Code: 9341^71-1 = 536321054561868323964339088560393553 * P243
 2014-10-22, 16:24 #179 Wick   Nov 2012 23·32 Posts Code: 3256411^47-1 = 123990551845517800255308540638002993 * P265
 2014-10-26, 14:54 #180 Wick   Nov 2012 23·32 Posts Code: 7123981^31-1 = 43768759531924424825804343483003280027079 * P165
 2014-11-08, 16:48 #181 chris2be8     Sep 2009 2×7×139 Posts The Brent tables numbers are getting a bit slow now, so I'll take a break doing some easier numbers from i_51_2000_101.txt (ECM first, then SNFS if necessary). Reserving: 5336717^31-1 86353^43-1 Chris
 2014-11-13, 08:51 #182 chris2be8     Sep 2009 194610 Posts 86353^43-1 won't need SNFS: Code: Resuming ECM residue saved by chris@4core with GMP-ECM 7.0-dev on Wed Nov 12 17:43:04 2014 Input number is 217299428303605750964143552796283167605200189138133468679725819860114113284236626937891491226949996388687364085089660351113758620972097016957505118361336117843690313385542307 (174 digits) Using B1=11000000-11000000, B2=35133391030, polynomial Dickson(12), sigma=3:1015838297 Step 1 took 0ms Step 2 took 9880ms ********** Factor found in step 2: 1637372497455859450293267396543566542531415101042697 Found probable prime factor of 52 digits: 1637372497455859450293267396543566542531415101042697 Probable prime cofactor 132712274477093288121747769682453224834821397665155641925536387218142707430499259969666227538455978469807950639694262317131 has 123 digits So reserving 2 more for ECM, then SNFS if necessary: 128493601339^17-1 3234152111453204401^13-1 Chris
 2014-11-16, 16:43 #183 chris2be8     Sep 2009 2·7·139 Posts 3234152111453204401^13-1 is partly factored: Code: ********** Factor found in step 2: 1652853993138597196148058279397800605185523 Found probable prime factor of 43 digits: 1652853993138597196148058279397800605185523 Composite cofactor 935095082010579037215732687663189797754745332333490467692099728082350935058700921649503756074918673994545632848959840194 336432094815758798024873569494141367 has 156 digits @Pascal, is it worth factoring the cofactor? And reserving: 6115909044841454629^13-1 Chris
 2014-11-17, 10:34 #184 Pascal Ochem     Apr 2006 5×19 Posts Thank you for handling these hard and wanted composites. Yes, it is worth factoring the cofactor. Would GNFS be faster than SNFS now ? If not, how much running time do we gain thanks to this P43 ?
 2014-11-17, 16:28 #185 chris2be8     Sep 2009 36328 Posts SNFS is probably still faster, so I'll finish ECM and do it with SNFS if necessary. The factor will speed up ECM on the remainder, but won't speed up SNFS significantly. Chris
 2014-11-19, 16:50 #186 chris2be8     Sep 2009 2·7·139 Posts (128493601339^17-1)/128493601338 is done: Code: prp65 factor: 34452638008244778981611333120697531502847222390102198059245165043 prp114 factor: 160280814865071785713452537694471065748660900049568848854977810227742276800252185006681533636600380338627173664667 Now sieving (5336717^31-1)/42350787022542390712689528236. Chris
 2014-11-21, 16:26 #187 chris2be8     Sep 2009 2·7·139 Posts (5336717^31-1)/42350787022542390712689528236 is done: Code: prp63 factor: 265757700716518315850245798632257963583805397294027009361810899 prp118 factor: 3119981568449506273767247469134777989749255822139409689159653216937820237303657893389473330479238708807367772544854913 And reserving (7176374761323733117^13-1)/13488856228255048616579328765896916. Chris

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