Brian J. Beesley wrote:

Although I have not tried it myself, I suspect that PRIME95 can
be run from a Memory Disk (RAM Disk).
If you have a USB pen drive then you could definitely run Prime95 in a folder located on it. About 32 MBytes should be enough to contain Prime95, its support files, log files & save files, even if you're working on very large exponents.

That's right. Two save files, results.txt, help & license files and both Windows and Linux binaries use about 20 MB on my HDD. And there is a way to prevent results.txt from growing too fast, if needed (ResultsFileIterations).



Files are not written often enough to cause a problem with "wearing out" flash memory within the normal lifetime of the system, and access speed should not be an issue - especially with newer pen drives supporting USB v2.

One can set prime95 to write save files less often, if necessary (DiskWriteTime).


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