20220404, 14:39  #2103 
"mrh"
Oct 2018
Temecula, ca
2×5×7 Posts 
This is a nice one:
M113334241 has a 112.193bit (34digit) factor: 5936815441525476391128324308118983 (P1,B1=551000,B2=21185000) 
20220404, 16:00  #2104 
Random Account
Aug 2009
Not U. + S.A.
100100011011_{2} Posts 
Of course it's not prime. All the ECM exponents in the GIMPS database with found factors are not prime either. That section should not exist.
Edit: I think you meant to say it is not a natural prime. Without the "2^" and "1" it has two factors. 37 and 199. Last fiddled with by storm5510 on 20220404 at 16:12 Reason: Additional 
20220404, 16:43  #2105  
Einyen
Dec 2003
Denmark
2^{3}×3^{2}×47 Posts 
Quote:
It IS still a Mersenne Number which are all 2^{n}1 for integer n: https://mathworld.wolfram.com/MersenneNumber.html BUT it is not a Mersenne Number that GIMPS cares about, since only those with prime exponents have a chance to be a Mersenne Prime, that is why it is not in the databases. https://www.mersenne.org/report_expo...hi=7400&text=1 Last fiddled with by ATH on 20220404 at 16:52 

20220405, 09:03  #2106 
"Oliver"
Sep 2017
Porta Westfalica, DE
1,153 Posts 
Finally got my first Top 10 P1 factor!
M239119 has a 157.217bit (48digit) factor: 212381331667662033847003656413805352059577410799 (P1,B1=30000000,B2=10120247026890) k = 3 × 71 × 5,573 × 79,999 × 830,887 × 1,653,749 × 5,047,213 × 674,304,195,209 
20220405, 13:43  #2107 
"James Heinrich"
May 2004
exNorthern Ontario
7377_{8} Posts 

20220405, 17:52  #2108  
Jul 2003
Behind BB
41·47 Posts 
Quote:


20220408, 00:05  #2109 
Random Account
Aug 2009
Not U. + S.A.
4433_{8} Posts 
P1 autoassigned by PrimeNet. Prime95 v29.8 B6
M113476799: Factor: 435875148110816983338962773598903 / (P1, B1=515000, B2=8368750) 
20220408, 02:32  #2110 
"James Heinrich"
May 2004
exNorthern Ontario
11·349 Posts 

20220408, 16:44  #2111 
Random Account
Aug 2009
Not U. + S.A.
3^{2}·7·37 Posts 
I am glad you ask this question. On my older systems, 29.x outperforms 30.x. I never run PRP's or certification work. If I don't use it, then I don't need the capability. I sometimes use a 6.x version of gpuOwl for P1's, but it is not selftending like Prime95 is. It is one less thing I have to keep up with.

20220408, 17:15  #2112 
"James Heinrich"
May 2004
exNorthern Ontario
11×349 Posts 
I can't comment to other worktypes, but this is absolutely untrue for P1. v30.8 has made absolutely huge gains in P1 performance. Do not judge it by how fast it runs, but by the bounds and probability it can achieve. Please don't do P1 badly, you'll miss factors unnecessarily and (if done badly enough) people may need to redo your work, which is the definition of inefficient.

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