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 2021-02-14, 01:23 #1794 Jwb52z     Sep 2002 78810 Posts P-1 found a factor in stage #2, B1=739000, B2=19974000. UID: Jwb52z/Clay, M102606121 has a factor: 286278308342764813608289 (P-1, B1=739000, B2=19974000), 77.922 bits.
 2021-02-14, 22:25 #1795 masser     Jul 2003 wear a mask 2×5×157 Posts M14021941 has a factor: 658712964914137545610873 (P-1, B1=550000, B2=50000000, e=12, n=800K CUDAPm1 v0.22) Not a very big one, but ... Brent-Suyama: P-1 = 658712 964914 137545 610872 = 2^3 × 3 × 23 × 29 × 41 × 67 × 14,021,941 × 1,068,297,817
2021-02-18, 17:00   #1796
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

332010 Posts

Quote:
 M74297 has a 115.150-bit (35-digit) factor: 46093402217811334422500629825749239 (ECM,B1=3000000,B2=300000000,Sigma=861422999935301)
Not my factor, but has a 98-bit prime k.

 2021-02-25, 15:28 #1797 storm5510 Random Account     Aug 2009 191910 Posts M672151 has a 92.364-bit (28-digit) factor: 6371270358962852152708374071 (ECM,B1=250000,B2=25000000,Sigma=1287986895578128) Is "sigma" a recent addition to the BBcode converter? I don't remember seeing it before. Last fiddled with by storm5510 on 2021-02-25 at 15:30
2021-02-25, 15:41   #1798
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

332010 Posts

Quote:
 Originally Posted by storm5510 Is "sigma" a recent addition to the BBcode converter? I don't remember seeing it before.
I added maybe 3 months ago.

 2021-03-06, 00:06 #1799 Runtime Error   Sep 2017 USA 5×47 Posts Not big enough for Top 500, but still pretty big! M102885221 has a 116.736-bit (36-digit) factor: 138350038577290668825510687167523289 (P-1,B1=1200000,B2=73200000)
 2021-03-09, 13:55 #1800 Xyzzy     "Mike" Aug 2002 2×5×11×73 Posts M32420933 has a 104.770-bit (32-digit) factor: 34588826421437796964455285406873 (P-1,B1=1000000,B2=1000000)
 2021-03-09, 22:15 #1801 firejuggler     Apr 2010 Over the rainbow 43×59 Posts M27133867 has a 103.452-bit (32-digit) factor: 13873846040230053282547473883439 (P-1,B1=1350000)
 2021-03-09, 22:23 #1802 Jwb52z     Sep 2002 22·197 Posts P-1 found a factor in stage #1, B1=742000. UID: Jwb52z/Clay, M103030289 has a factor: 123545495958101009290577 (P-1, B1=742000), 76.709 bits.
 2021-03-09, 22:48 #1803 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 224118 Posts User Bruno Victal found a top 500 factor: 7121 has a factor: 981699625212423826313904772778259971143 129.529 bits, 39 digits k 68929899256594848077089227129494451 = 3 × 7 × 61 × 53809445165179428631607515323571
 2021-03-10, 02:48 #1804 axn     Jun 2003 132·29 Posts It does happen! Code: M3719987 has a factor: 881990415365354042303 [TF:69:70:mfaktc 0.21 barrett76_mul32_gs] M3719987 has a factor: 594140183196613372391 [TF:69:70:mfaktc 0.21 barrett76_mul32_gs] found 2 factors for M3719987 from 2^69 to 2^70 [mfaktc 0.21 barrett76_mul32_gs]

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