20210820, 11:39  #1926 
Dec 2016
91_{10} Posts 
M1897121 has a 77.294bit (24digit) factor: 185310913945752397948441 (ECM,B1=50000,B2=6750000) < the 9th known factor
M194653 has a 119.349bit (36digit) factor: 846314715301812068679342636153284159 (ECM,B1=1000000,B2=135000000) < the 9th known factor M599803 has a 106.747bit (33digit) factor: 136181509257226777136568353013047 (ECM,B1=3000000,B2=528000000) < the 10th known factor! I'll run more curves on them, maybe I get lucky and beat the current record of 11 known factors. 
20210820, 15:00  #1927 
"Vincent"
Apr 2010
Over the rainbow
3·5·179 Posts 
Wow, very nice!

20210825, 07:29  #1928 
"Alexander"
Nov 2008
The Alamo City
1410_{8} Posts 
New P+1 factor: 67111165753873384058235537928247 for M5210563 (B1=1,250,000, start=2/7) (105.726 bits)
It's my largest nonECM factor ever and just half a bit off my personal best. All from stage 1 with low (but recommended) bounds. Plus it's the first factor for that exponent. Last fiddled with by Happy5214 on 20210825 at 07:29 Reason: Add M 
20210825, 19:39  #1930  
Jul 2003
Behind BB
11011101000_{2} Posts 
Quote:


20210826, 11:48  #1931 
"University student"
May 2021
Beijing, China
127 Posts 
M111298777 has a factor: 135398831970267435540791 (76.842 bits)
k = 5 × 23 × 37 × 313 × 1069 × 427241 Another P1 smooth factor found by TF. 
20210827, 15:16  #1932  
"University student"
May 2021
Beijing, China
177_{8} Posts 
Quote:
2 factors were found out of 22 trials in the 111.2M range. That's lucky enough, for there were some time when I tested more than 500 exponents without finding a single factor. 

20210827, 21:30  #1933 
Sep 2002
3·269 Posts 
P1 found a factor in stage #1, B1=762000.
UID: Jwb52z/Clay, M105693659 has a factor: 215018688290325922746529 (P1, B1=762000) 77.509 bits. 
20210829, 17:51  #1934 
Aug 2020
79*6581e4;3*2539e3
2^{2}·107 Posts 
I was running a few ECM small assignments and a factor turned up.
Sigma=5667910856171759, B1=50000, B2=5000000. M2088329 has a factor: 185217242100981866539823 24 digits, 77.3 bits k = 197 * 1237 * 181977029831 
20210830, 03:49  #1936  
Romulan Interpreter
"name field"
Jun 2011
Thailand
9812_{10} Posts 
Quote:
Congrats! 

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Bad Factor from PM1  petrw1  PrimeNet  31  20150324 16:49 
1M9M GPU TF vs. CPU P1/ECM (KWh/factor)  VictordeHolland  Lone Mersenne Hunters  4  20150307 09:29 
A fond farewell  rogue  Lounge  10  20081121 05:25 
New factor  fivemack  ElevenSmooth  4  20080507 19:28 
Shortest time to complete a 2^67 trial factor (no factor)  dsouza123  Software  12  20030821 18:38 