Prime95 30.7 - Page 16

Prime95 · 2021-12-18, 05:25

Quote:

Originally Posted by emiller

Is it possible to get a Mac OS 64 bit version or instructions for how to compile?

Try this: https://www.dropbox.com/s/xo7psmmjfk...SX.tar.gz?dl=0

It is version 30.3 command line version which supports PRP proofs. As always, only for Intel CPUs.

emiller · 2021-12-18, 17:20

Thanks for the link but this version is giving me the following:

Code:

dyld: Symbol not found: _curl_mime_init
  Referenced from: /Users/emiller/prime95/p95v303b6.MacOSX/./mprime
  Expected in: /usr/lib/libcurl.4.dylib

Abort trap: 6

I found a link to this build earlier, thought I'd ask if there was a more recent build.

emiller · 2021-12-27, 02:16

Maybe a build with only static linking?

Prime95 · 2022-01-02, 23:22

Quote:

Originally Posted by emiller

Thanks for the link but this version is giving me the following:

Code:

dyld: Symbol not found: _curl_mime_init
  Referenced from: /Users/emiller/prime95/p95v303b6.MacOSX/./mprime
  Expected in: /usr/lib/libcurl.4.dylib

Abort trap: 6

I found a link to this build earlier, thought I'd ask if there was a more recent build.

I just built 30.7 build 9. It likely has the same libcurl problem. If so, let me know and I'll see if static linking is possible.

James Heinrich · 2022-01-02, 23:30

Quote:

Originally Posted by Prime95

I just built 30.7 build 9. It likely has the same libcurl problem. If so, let me know and I'll see if static linking is possible.

Available here, if that wasn't immediately apparent:
https://mersenne.org/ftp_root/gimps/....MacOSX.tar.gz

Prime95 · 2022-01-03, 04:00

Quote:

Originally Posted by emiller

Maybe a build with only static linking?

I think I figured out how to do this, please report on whether it worked.

congsz · 2022-01-10, 10:02

In the Prime95 software, when I clicked on 'Advanced--ECM', the default setting of the 'number to factor' is 2^1061-1. However, this number has been completely factored roughly ten years ago, so I wish the default could be changed to 2^1277-1, which is currently the smallest Mersenne composite that we haven't found any factors of.

Zhangrc · 2022-01-10, 10:09

Quote:

Originally Posted by congsz

In the Prime95 software, when I clicked on 'Advanced--ECM', the default setting of the 'number to factor' is 2^1061-1. However, this number has been completely factored roughly ten years ago, so I wish the default could be changed to 2^1277-1, which is currently the smallest Mersenne composite that we haven't found any factors of.

Yes, but millions of GHZ-days have already been spent on that exponent with no factor found. the smallest factor might be at least 2^300.
Maybe no default number?
(Happy to see another Chinese user

)
(ps: why don't you suggest 2^1949001-1 ....)

pyajve · 2022-01-16, 06:35

Not very popular case, P-1 then TF-LMH, but still. Version mprime-30.7b9 on Linux Debian on 4-core E3-1240 v6 CPU crashes when completing P-1 and switching to trial factoring.
My configuration has 1 worker and 4 cores.

worktodo.txt
PFactor=3D003848AAF4D766D47DC6759098C9B1,1,2,108611647,-1,77,2
Factor=621092F3083ADEA698FF551DF07864ED,238617823,73,74

When trying to send the result to server and switch from 4 threads on P-1 (one main, three helpers) to 8 threads on TF the application crashes.

./mprime -d -c

This reports the completed work unit to server leaving only Factor= in the worktodo.

./mprime -d

[Main thread Jan 16 06:28] Mersenne number primality test program version 30.7
[Main thread Jan 16 06:28] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 4x256 KB, L3 cache size: 8 MB
[Main thread Jan 16 06:28] Starting worker.
[Work thread Jan 16 06:28] Worker starting
[Work thread Jan 16 06:28] Setting affinity to run worker on CPU core #1
[Work thread Jan 16 06:28] Setting affinity to run helper thread 1 on CPU core #1
[Work thread Jan 16 06:28] Setting affinity to run helper thread 3 on CPU core #2
[Work thread Jan 16 06:28] Setting affinity to run helper thread 5 on CPU core #3
[Work thread Jan 16 06:28] Setting affinity to run helper thread 7 on CPU core #4
[Work thread Jan 16 06:28] Starting trial factoring of M238617823 to 2^74
[Work thread Jan 16 06:28] Setting affinity to run helper thread 2 on CPU core #2
Segmentation fault

Manually run TF on mfaktc on Windows, so no work unit is lost.

Could somebody please look at the Seg fault issue.

S485122 · 2022-01-16, 09:24

With an AVX512F capable processor I see 2 to 4 % lower iteration times on bigger exponents using a 3200 K FFT than lower exponents using a 3136 K FFT. I could force the FFT length.
As far as I know, the benchmarks do not test different FFT length for a given exponent.

Prime95 · 2022-01-19, 05:09

Quote:

Originally Posted by pyajve

Version mprime-30.7b9 on Linux Debian on 4-core E3-1240 v6 CPU crashes when completing P-1 and switching to trial factoring.

Could somebody please look at the Seg fault issue.

Will be fixed in next 30.8 build. Only affects TF using the AVX-512 instruction set. It is an assembler bug with an easy workaround.

2021-12-18, 17:20	#167
emiller Apr 2017 2·5 Posts	Thanks for the link but this version is giving me the following: Code: dyld: Symbol not found: _curl_mime_init Referenced from: /Users/emiller/prime95/p95v303b6.MacOSX/./mprime Expected in: /usr/lib/libcurl.4.dylib Abort trap: 6 I found a link to this build earlier, thought I'd ask if there was a more recent build.

2022-01-10, 10:02	#172
congsz "Cong Shengzhuo" Sep 2021 Nanjing, China 43₁₀ Posts	A small advice to the Prime95 software In the Prime95 software, when I clicked on 'Advanced--ECM', the default setting of the 'number to factor' is 2^1061-1. However, this number has been completely factored roughly ten years ago, so I wish the default could be changed to 2^1277-1, which is currently the smallest Mersenne composite that we haven't found any factors of.

2022-01-16, 06:35	#174
pyajve "Andrei Piaive" Aug 2015 11₂ Posts	Segmentation fault on Debian Linux Not very popular case, P-1 then TF-LMH, but still. Version mprime-30.7b9 on Linux Debian on 4-core E3-1240 v6 CPU crashes when completing P-1 and switching to trial factoring. My configuration has 1 worker and 4 cores. worktodo.txt PFactor=3D003848AAF4D766D47DC6759098C9B1,1,2,108611647,-1,77,2 Factor=621092F3083ADEA698FF551DF07864ED,238617823,73,74 When trying to send the result to server and switch from 4 threads on P-1 (one main, three helpers) to 8 threads on TF the application crashes. ./mprime -d -c This reports the completed work unit to server leaving only Factor= in the worktodo. ./mprime -d [Main thread Jan 16 06:28] Mersenne number primality test program version 30.7 [Main thread Jan 16 06:28] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 4x256 KB, L3 cache size: 8 MB [Main thread Jan 16 06:28] Starting worker. [Work thread Jan 16 06:28] Worker starting [Work thread Jan 16 06:28] Setting affinity to run worker on CPU core #1 [Work thread Jan 16 06:28] Setting affinity to run helper thread 1 on CPU core #1 [Work thread Jan 16 06:28] Setting affinity to run helper thread 3 on CPU core #2 [Work thread Jan 16 06:28] Setting affinity to run helper thread 5 on CPU core #3 [Work thread Jan 16 06:28] Setting affinity to run helper thread 7 on CPU core #4 [Work thread Jan 16 06:28] Starting trial factoring of M238617823 to 2^74 [Work thread Jan 16 06:28] Setting affinity to run helper thread 2 on CPU core #2 Segmentation fault Manually run TF on mfaktc on Windows, so no work unit is lost. Could somebody please look at the Seg fault issue.

2021-12-27, 02:16	#168
emiller Apr 2017 2×5 Posts	Maybe a build with only static linking?

2022-01-16, 09:24	#175
S485122 "Jacob" Sep 2006 Brussels, Belgium 1,901 Posts	With an AVX512F capable processor I see 2 to 4 % lower iteration times on bigger exponents using a 3200 K FFT than lower exponents using a 3136 K FFT. I could force the FFT length. As far as I know, the benchmarks do not test different FFT length for a given exponent.