20200901, 21:52  #1618 
Sep 2002
Oeiras, Portugal
2^{4}×89 Posts 
True. I wonder why that effort was not reported to Primenet and only one curve is mentioned.
Last fiddled with by lycorn on 20200901 at 21:54 
20200901, 23:28  #1619  
"James Heinrich"
May 2004
exNorthern Ontario
3^{2}×5×71 Posts 
Quote:
Code:
M2137 completed 8596 ECM curves, B1=110000000, B2=776278396540 M2137 completed 19664 ECM curves, B1=260000000, B2=3178559884516 M2137 completed 348 ECM curves, B1=850000000, B2=14899382397918 

20200902, 00:30  #1620 
P90 years forever!
Aug 2002
Yeehaw, FL
1C38_{16} Posts 

20200902, 03:47  #1621  
Jun 2012
Boulder, CO
11010100_{2} Posts 
Quote:
Actually, this factor was found in stage 2: Code:
GMPECM 7.0.5dev [configured with GMP 6.2.0, GWNUM 29.8, enableasmredc, enableassert] [ECM] Due to incompatible licenses, this binary file must not be distributed. Input number is 2^21371 (644 digits) Using B1=2900000000, B2=81712898767516, polynomial Dickson(30), sigma=0:8561132775016161148 Step 1 took 20559097ms Step 2 took 12655697ms ********** Factor found in step 2: 434527865148151913428610180914321766584011558417928142522774921 Found prime factor of 63 digits: 434527865148151913428610180914321766584011558417928142522774921 Composite cofactor (2^21371)/434527865148151913428610180914321766584011558417928142522774921 has 581 digits 

20200902, 12:34  #1622  
"James Heinrich"
May 2004
exNorthern Ontario
3^{2}×5×71 Posts 
How do you generate the result line you submitted from that? Do you just handcraft those when you find a factor?
Quote:
Quote:


20200902, 19:04  #1623 
Sep 2002
Oeiras, Portugal
2^{4}×89 Posts 
So it actually looks like only one curve was run.
It´s an amazing strike of luck to find a factor this size on curve #1... 
20200902, 19:05  #1624 
Jul 2018
Martin, Slovakia
263 Posts 
Another member of 9factor community

20200902, 19:20  #1625 
Jun 2012
Boulder, CO
324_{8} Posts 

20200902, 20:05  #1626  
"James Heinrich"
May 2004
exNorthern Ontario
3^{2}×5×71 Posts 
Quote:
Quote:


20200902, 20:23  #1628 
Apr 2010
Over the rainbow
13×191 Posts 
and factordb tell us it is FF http://factordb.com/index.php?query=M1999

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Turn off GCC sseusing optimizations?  ewmayer  Programming  3  20160930 07:15 
AMD goes inane  jasong  jasong  18  20131115 22:54 
When I run PRIME95, my computer threatens to turn off  Rafael  Information & Answers  12  20120102 19:38 
A fond farewell  rogue  Lounge  10  20081121 05:25 
turn off your integrated Snd card in CMOS  nngs  Hardware  0  20050520 01:31 