Hi all,
I've been working on version 24 for quite some time and a release candidate
is now available:
Windows:
<ftp://mersenne.org/gimps/p95v2412.zip>ftp://mersenne.org/gimps/p95v2412.zip
Windows 64-bit:
<ftp://mersenne.org/gimps/p64v2412.zip>ftp://mersenne.org/gimps/p64v2412.zip
WinNT service:
<ftp://mersenne.org/gimps/winnt2412.zip>ftp://mersenne.org/gimps/winnt2412.zip
Linux:
<ftp://mersenne.org/gimps/mprime2412.tar.gz>ftp://mersenne.org/gimps/mprime2412.tar.gz
or
Static Linux:
<ftp://mersenne.org/gimps/sprime2412.tar.gz>ftp://mersenne.org/gimps/sprime2412.tar.gz
For those that have not been following the developments on mersenneforum.org,
in a nutshell it is faster for SSE2 machines and Athlon XP machines. It
may well
be slower for Pentium 3 and earlier Intel machines.
The full whatsnew.txt reports:
New features in Version 24.12 of prime95.exe
--------------------------------------------
1) For SSE2 machines the larger FFTs have been changed to more effectively
use a wide variety of L2 cache sizes. The previous version was optimized
for a 256KB L2 cache only. Depending on your CPU and FFT size, you could
see an improvement of several percent.
2) As a side "benefit" even larger FFT sizes are now supported. This allows
testing of exponents up to 596 million. Not recommended.
3) The factoring breakeven points have been recalculated using my 2 GHz P4.
This version of prime95 will do less trial factoring.
4) Since server database crashes cause spurious error 3 messages, prime95
will now ignore error 3 messages from the server for 72 hours. This
should
workaround the problem whereby a result is reported but no CPU credit is
given and the reservation is not cleared.
New features in Version 24.11 of prime95.exe
--------------------------------------------
1) Faster FFTs for AMD64 using prefetchw in both 32-bit and 64-bit mode.
You can expect about a 15% speed improvement.
2) Prime95 now detects support for 3DNow! instructions. See undoc.txt
for overriding this detection with CpuSupports3DNow=n in local.ini.
3) Factoring entries in worktodo.ini now accept exponents up to 2 billion.
4) Improved checking for memory allocation errors during a torture test.
Better guessing of amount of memory to use in a blend test.
5) Added timeouts to PrimeNet communications in hopes of avoiding rare hangs
when contacting the PrimeNet server.
6) Fixed rare bug where P-1's GCD could miss a factor.
7) Added trial factoring to the benchmark.
8) Fixed bug in ECM when using zero-padded FFTs.
9) SSE2 macros optimized for an additional 1-3% improvement on P4 and AMD64
CPUs.
New features in Version 24.10 of prime95.exe
--------------------------------------------
1) 64-bit version of prime95 available for 64-bit Windows.
New features in Version 24.9 of prime95.exe
-------------------------------------------
1) Fixed crash when running on machines with "no-execute" protection.
2) Fixed mis-detection of some P3 and Celeron CPUs.
New features in Version 24.6 of prime95.exe
-------------------------------------------
1) Athlon users should see a 20% to 30% speed increase.
2) Pentium, Pentium II, Pentium III users should see dramatically WORSE
performance. Run version 23 instead.
3) P-1 and ECM now support numbers of the form k*b^n+c. This cannot be done
from the menus. Add these entries to worktodo.ini:
Pminus1=k,b,n,c,B1,B2
ECM2=k,b,n,c,B1,B2,curves_to_do[,specific_sigma]
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