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20211022, 08:43  #12 
Einyen
Dec 2003
Denmark
3,251 Posts 

20211022, 13:06  #14 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
6,091 Posts 
Presumably that + is for up to 1G mersenne.org limit, or 1169M max of AVX512 prime95. Or would it apply all the way up to say OBD (3322M)? Is the optimal proof power an output of a straightforward function or does it require empirical testing to determine?

20211022, 18:05  #15  
P90 years forever!
Aug 2002
Yeehaw, FL
5×1,553 Posts 
Quote:
I didn't worry about OBD, it looks like the next transition will be near 1600M. 

20211022, 18:46  #16 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
17CB_{16} Posts 
Looks like about every 2 bits on fft length is +1 on proof power. So (extrapolating in Mlucas fft lengths) that would imply power 12 would be sufficient to ~6.2G, ~1.87 Gdigit, not something of concern for decades or centuries.
Last fiddled with by kriesel on 20211022 at 18:47 
20211022, 19:54  #17  
Undefined
"The unspeakable one"
Jun 2006
My evil lair
6324_{10} Posts 
Quote:
Quote:
https://xkcd.com/license.html 

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