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2016-04-17, 16:11   #12
chris2be8

Sep 2009

23·52·11 Posts

Quote:
 Originally Posted by VBCurtis I don't post my riesel factorizations to factordb, just to Mr Klasson's site mklasson.com/factors.
Would any of them be smaller that 120 digits? I've factored quite a few numbers of form k.2^n-1 from factordb up to 119 digits and would not like to duplicate work already done.

Chris

 2016-04-17, 17:51 #13 VBCurtis     "Curtis" Feb 2005 Riverside, CA 507310 Posts Mr Klasson's site tracks only k up to 15, and all our remaining composites are 140 digits or larger. I've done a tiny bit of work on k = 17, but just a few CPU-days; I haven't reported those anywhere 'cause I didn't get very far.
 2016-05-30, 17:03 #14 Sergiosi   Jun 2013 5×19 Posts c148 from aliquot sequence 408744:3148 Code: # norm 3.422363e-14 alpha -5.936394 e 8.106e-12 rroots 3 n: 1939235571660442813608521123434086136566665985795776526640156438531510063789721209109117030743430409872362039274329991351238526535353904463675807293 skew: 2404280.47 c0: 233883264091628136257904310643233100 c1: 556563406433388443697653664984 c2: 35679083825503403846141 c3: -292727754019326750 c4: 52297325102 c5: 9384 Y0: -46030775765190921922799593593 Y1: 20896840736748613
 2016-10-07, 20:17 #15 richs     "Rich" Aug 2002 Benicia, California 56A16 Posts Info for a smaller composite: c142 from aliquot 230916:4353 nfs: best poly = # norm 1.452046e-013 alpha -7.449783 e 1.839e-011 rroots 5 Code: n: 2214530379364092803459638419536438964802657787609806173924788906066752569852980243396068528822409949982646950184731021275523496063306697681557 skew: 4298464.62 c0: -133976463209871790707384401241967320 c1: 187123613165673476928418960866 c2: 582640885581702975557647 c3: -118486544502128332 c4: -29754859796 c5: 336 Y0: -5804839216569921148884028637 Y1: 1299585929038877 rlim: 16000000 alim: 16000000 lpbr: 28 lpba: 28 mfbr: 56 mfba: 56 rlambda: 2.6 alambda: 2.6
 2016-10-23, 07:00 #16 cgy606   Feb 2012 32·7 Posts A C155 from 119!-5: Code: n:14983833053669267073388859640749386761592128691535474632716887403740027331275486495085918514582693799340373342068801035123016311177538173489337402480577483 skew 5708636.19, size 5.616e-015, alpha -7.542, combined = 3.121e-012 rroots = 5 R0: -850553565122869061034261830287 R1: 18849943498486567 A0: 172196109872180577784598294873273361360 A1: 51833966860496483626341772381252 A2: -41070998680490039762041384 A3: -6784822293841150427 A4: 1635166252008 A5: 33660
 2017-02-06, 19:18 #17 Sergiosi   Jun 2013 5·19 Posts c151 from aliquot sequence 342144:443 Code: n: 1057572529953947070986938242548533726767656546881332202207999800177097248084986188497807677378705213106913529877330809960101368031087345156307598824387 skew 9780541.55, size 1.494e-14, alpha -7.045, combined = 5.583e-12 rroots = 5 R0: -192547063000931257915545809262 R1: 4436889611965919 A0: 48278227434498164276953134432192997525 A1: 43535400704061552233504534289680 A2: -6992291974079133447242434 A3: -1132852896075083372 A4: 75631249005 A5: 3996
 2017-02-10, 17:21 #18 Max0526   "Max" Jun 2016 Toronto 90610 Posts C146 cofactor of (136*10^208-1)/9 http://stdkmd.com/nrr/c.cgi?q=15111_208 Code: # Murphy_E = 1.23248345e-11, selected by Maksym Voznyy # selected by CADO-NFS n: 11133083975614393174618106789842541849999798450075953644503853715832934826650529799267849607478318984750751468487348433361620156657048935628137667 Y0: -8465139152662472823271804899 Y1: 217586749880489433607 c0: 40603904011815270118467328499250 c1: -7258916478497188892538718405 c2: 26792661013772231492628 c3: 394898230885063231 c4: 69401799606 c5: 1534680 skew: 196661.06596 type: gnfs Last fiddled with by Max0526 on 2017-02-10 at 17:22
 2017-02-11, 00:07 #19 Max0526   "Max" Jun 2016 Toronto 2·3·151 Posts C142 cofactor of (10^216+71)/9 http://stdkmd.com/nrr/cont/1/11119.htm#N216_C142 Code: # Murphy_E = 2.01586429e-11, selected by Maksym Voznyy # selected by CADO-NFS n: 3588400670974042702680837405464660540266389269005727836794465390573635642433026540041089934357245315252071761211898253220884617929306428555561 Y0: -3951518283918039803675904937 Y1: 4944813883904086457 c0: 4154836225756427964694338997956720 c1: 84338193174923556177344446154 c2: -14212371709515276223669 c3: -56200227425000130 c4: 3755305958 c5: 3720 skew: 2057884.15124 type: gnfs
 2017-02-11, 00:44 #20 Max0526   "Max" Jun 2016 Toronto 2·3·151 Posts C157 cofactor of (58*10^224+23)/9 http://stdkmd.com/nrr/c.cgi?q=64447_224 Code: # Murphy_E = 2.74132554e-12, selected by Maksym Voznyy # selected by cado-nfs-2.2.0 n: 3052808714827299474913563042768663387446103747677187192092256054878499303741346332759423101801264392420724180666344408744793985066320550196201898450311255111 Y0: -2918999876811939818911761664529 Y1: 65491369105410737643217 c0: 1027302415368579954614447177408865340 c1: 5357797564515979755713712585209 c2: 7717777084391720884069418 c3: -3919335731067285077 c4: -874303257420 c5: 280800 skew: 2366600.14884 type: gnfs
 2017-02-11, 00:57 #21 Max0526   "Max" Jun 2016 Toronto 2×3×151 Posts C172 cofactor of 13*2^905-1 poly found by CADO-NFS http://ftp.mersenneforum.org/showpos...&postcount=759 Code: Msieve v. 1.52 (SVN 958) N=1374250293977900524006825181025041222391785962418349198188752592542556833408706796147779390990626204883096007787340300959668458776589915992783964729160514357520386806570509 R0: -2428783629542938000277341534964669 R1: 66381298897887862049 A0: 1684917805428384144779731520398675160500 A1: -3745304290230496073233576119438452 A2: -2342124466784250014333947213 A3: 259669333218732646325 A4: 9553108753746 A5: 97560 skew 13056627.55, size 1.255e-016, alpha -7.189, combined = 3.338e-013
2017-02-12, 01:35   #22
Max0526

"Max"
Jun 2016
Toronto

90610 Posts
C156

Quote:
 Originally Posted by richs C156 from Aliquot sequence 829332:3605. Poly found by VBCurtis. Code: N 163727926668678035939618053446364480300300719840063508810834694701350128493871168693101567743639977109458829559656666787504985092716814050668990858237669441 SKEW 2799412.69 R0 -1146089445280446698217724846984 R1 29984411104464641 A0 -8388623445446886233513062917901701375 A1 8123777995019347585820981509456 A2 5398445052487820593051471 A3 -3891197957664010388 A4 -1016172369612 A5 82800 #skew 2799412.69, size 4.507e-15, alpha -6.202, combined = 2.765e-12 rroots = 5
Code:
Y0: -1146089485327806075807326154430
Y1: 29984411104464641
c0: -2790893747295827131295746006836959259
c1: -2365843220115152814791290474280
c2: 8140892661148809990618571
c3: 3014648022519417100
c4: -1569113253612
c5: 82800
skew: 2591483.69774
# lognorm 48.45, E 42.01, alpha -6.44 (proj -2.68), 5 real roots
# MurphyE(Bf=1.00e+07,Bg=5.00e+06,area=1.00e+16)=2.89031034e-12

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