20230326, 16:16  #34  
"James Heinrich"
May 2004
exNorthern Ontario
2×2,083 Posts 
Quote:
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20230326, 16:27  #35 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
7,537 Posts 
Why not let prime95 do its optimization undistorted by misleading inputs? The most likely scenario is the DC is a PRP with proof generation, so only one more primality test will occur after these retries of P1 to better bounds with a more efficient algorithm for exponents preselected with really poor initial P1 bounds.

20230326, 21:09  #36  
"/X\(‘‘)/X\"
Jan 2013
23·137 Posts 
Quote:
Some recent results. The first machine has 23 GB allocated and the rest 30 GB. Code:
worktop 101907739 NFPM1 20230326 20:44:51 B1=473000, B2=62802600 leonardo 106941547 NFPM1 20230326 20:44:47 B1=488000, B2=77781900 raphael 106958389 NFPM1 20230326 20:41:41 B1=488000, B2=77781900 michelangelo 106952711 NFPM1 20230326 20:04:03 B1=488000, B2=77781900 splinter 106964681 NFPM1 20230326 20:02:26 B1=488000, B2=77781900 

20230327, 14:49  #37 
"/X\(‘‘)/X\"
Jan 2013
C4F_{16} Posts 
Took 229:
Pfactor=1,2,100400879,1,77,1 through Pfactor=1,2,100978307,1,78,1 Leaving 790. Last fiddled with by Prime95 on 20230327 at 19:43 Reason: List updated 
20230327, 17:37  #38 
Random Account
Aug 2009
Not U. + S.A.
A3E_{16} Posts 
As a general rule, I run P1's on a GPU using gpuOwl. A guess is that your B1 and B2 are too large to run on a GPU. Off hand, I don't know of a GPU with 32 GB of VRAM. Perhaps down the road sometime...

20230327, 17:49  #39 
"James Heinrich"
May 2004
exNorthern Ontario
1046_{16} Posts 
The relativelycommon RTX 4090 has 24GB, but higherend cards can certainly have more, e.g. Radeon PRO W6800 = 32GB, A40 = 48GB, A100 = 80GB.

20230327, 21:25  #40  
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
1110101110001_{2} Posts 
Quote:
On modest exponents, large bounds could be run in gpuowl, and even up to 1G exponents, on 16GiB GPUs, but run times would be long. See https://www.mersenneforum.org/showpo...5&postcount=17 

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