20210523, 08:22  #1 
"Nigel"
Apr 2021
2^{2}×5 Posts 
New mersenne factor found, what to do with it?
I found a new mersenne factor:
17120076576497274889 divides M9999971879 I found it using factor5. How do I send it to the Mersenne.ca server? If I did not do any miscalculations this is the 6th factor of M9999971879. Last fiddled with by mersenneNoob on 20210523 at 08:35 
20210523, 09:00  #2 
"Nigel"
Apr 2021
2^{2}·5 Posts 
Do I send an email or what?
Last fiddled with by mersenneNoob on 20210523 at 09:18 
20210523, 11:05  #3 
Jun 2003
2×2,719 Posts 
You can try submitting it via https://www.mersenne.ca/bulkfactors.php
But it looks like it is set to accept mfaktc result format. I'll move this thread to mersenne.ca subforum. Maybe James will see it. 
20210523, 23:31  #4 
"Nigel"
Apr 2021
2^{2}·5 Posts 
thanks, axn!

20210524, 00:11  #5  
"James Heinrich"
May 2004
exNorthern Ontario
2·7·293 Posts 
Quote:
Code:
UID: mersenneNoob/myComputerName, M9999971879 has a factor: 17120076576497274889 

20210524, 00:24  #6 
"Nigel"
Apr 2021
14_{16} Posts 

20210530, 15:05  #7 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
2^{2}×19×97 Posts 
Please help with GIMPS wavefront TF with a GPU, or supplement the 100Mdigit TF with a GPU. Trial factoring is not effective use of a CPU when there's a GPU alternative.
If you feel compelled to work above the range of mfaktx (centuries ahead of GIMPS TF need), there's the possibility of mmff for double mersennes on GPU. Or for mersennes above the 2^{32} of mfaktx, there's Ernst's Mfactor program, several times the speed of factor5. Please educate yourself on the available resources and run time scaling. Last fiddled with by kriesel on 20210530 at 15:06 
20210531, 10:49  #8  
Banned
"Luigi"
Aug 2002
Team Italia
4857_{10} Posts 
Quote:


20210531, 13:01  #9 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
2^{2}·19·97 Posts 
No idea if it will compile for that. It seems possible, since Mlucas is. I imagine an answer could come from
1) inspecting the source code 2) attempting a compile 3) a reply by Ernst A quick look into source module factor.c for "arm" finds #if (TRYQ > MAX_TRYQ) && !defined(USE_ARM_V8_SIMD) // Ignore on ARMv8, since no TF support there anyway 
20210630, 21:46  #10 
Jun 2021
135_{10} Posts 
Good job! You can say that you can multiply 17120076576497274889 enough times to get M9999971879!
Last fiddled with by birtwistlecaleb on 20210630 at 22:01 
20210630, 21:51  #11  
"James Heinrich"
May 2004
exNorthern Ontario
2·7·293 Posts 
Quote:


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