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Bloody Hell -- "file/folder not found" in Linux Mint
I can mv, cp, or ls the file using the full name or wildcards, but when I try to run it, it turns out it's somehow not there. ls -l shows I am the owner of the file, and I can read, write, or execute it. BUT it won't run. Any ideas ??
8 replies
= new reply since forum marked as read
= new reply since forum marked as read
know how to think for themselves, treat others like they want to be treated, that sort of thing.
Then where would we be? 
Can you tell me how this realates to any windows vs. mac vs. linux debates???
CUDALucas is a program implementing the Lucas-Lehmer primality test for
Mersenne numbers using the Fast Fourier Transform implemented by nVidia's
cuFFT library. You need a CUDA-capable nVidia card with compute
compatibility >= 1.3.
Mersenne numbers are numbers of the form 2^p - 1. It is possible that some
of these numbers are prime. For instance, 2^7-1 is prime, 2^127-1 is prime,
and 2^57,885,161-1 is prime (and is also the largest known prime number in
the world). For various reasons explained in the Wikipedia article,
throughout almost all known history, the largest known prime number has
been a Mersenne prime.
Most CUDALucas users that the developers are aware of use this program to
help search for Mersenne primes in coordination with the Great Internet
Mersenne Prime Search. It is one of the internet's first distributed
computing projects, started in 1996. Since that year GIMPS has found all of
the largest known prime numbers. GIMPS searches for primes by doing some
"trial factoring" to find a small factor of a Mersenne number. If that
fails, then GIMPS performs the Lucas-Lehmer test to determine once and for
all if a Mersenne number is prime. You can participate without needing to
be aware of the mathematics involved. All you need to do is download and
run the free program GIMPS provides called Prime95.
However, Prime95 is optimized for CPUs. In the last few years, volunteer
developers from the GIMPS community have ported various parts of Prime95's
functionality to GPUs. Shoichiro Yamada took a CPU-based Lucas-Lehmer
testing program (written in generic C, as opposed to the x86-specific
assembly of Prime95) and ported it to CUDA. This is now known as CUDALucas.
http://sourceforge.net/projects/cudalucas/files
Mersenne numbers using the Fast Fourier Transform implemented by nVidia's
cuFFT library. You need a CUDA-capable nVidia card with compute
compatibility >= 1.3.
Mersenne numbers are numbers of the form 2^p - 1. It is possible that some
of these numbers are prime. For instance, 2^7-1 is prime, 2^127-1 is prime,
and 2^57,885,161-1 is prime (and is also the largest known prime number in
the world). For various reasons explained in the Wikipedia article,
throughout almost all known history, the largest known prime number has
been a Mersenne prime.
Most CUDALucas users that the developers are aware of use this program to
help search for Mersenne primes in coordination with the Great Internet
Mersenne Prime Search. It is one of the internet's first distributed
computing projects, started in 1996. Since that year GIMPS has found all of
the largest known prime numbers. GIMPS searches for primes by doing some
"trial factoring" to find a small factor of a Mersenne number. If that
fails, then GIMPS performs the Lucas-Lehmer test to determine once and for
all if a Mersenne number is prime. You can participate without needing to
be aware of the mathematics involved. All you need to do is download and
run the free program GIMPS provides called Prime95.
However, Prime95 is optimized for CPUs. In the last few years, volunteer
developers from the GIMPS community have ported various parts of Prime95's
functionality to GPUs. Shoichiro Yamada took a CPU-based Lucas-Lehmer
testing program (written in generic C, as opposed to the x86-specific
assembly of Prime95) and ported it to CUDA. This is now known as CUDALucas.
http://sourceforge.net/projects/cudalucas/files
It looks to me like this is fussy specialized software in any operating system. And there is no Apple version, if that's what you are looking for.
Maybe Apple has it's own very expensive version, but I doubt it.
I don't have any use professionally or personally for overwrought graphics hardware. My computers, currently microsoft XP era or earlier, tend to be diverted from the electronic waste bin. There's no way they'd run later Microsoft products, but they are more than agile enough running Debian.
Linux, as a tool, works much better for my purposes than any proprietary operating system possibly could.
