Google CoLab Instructions (CPU and GPU) about distributed-computing-scripts

[tdulcet]

Wow! Thanks for doing all this research!

Some notes on the code:

1. You will want to replace sudo apt-get upgrade with sudo apt-get dist-upgrade -y to update everything.
2. You will likely need to replace /content/mprime/mprime -d with cd /content/mprime/ && ./mprime -d so that MPrime starts in the correct directory with its configuration files (this is probably why you have not received any info back).
3. Does the MPrime script run without errors? You mentioned cron not being installed, so I assume the crontab line produces an error. You may want to download the script, remove the lines that you do not want or that do not work and then execute it. For example:

wget https://raw.github.com/tdulcet/Distributed-Computing-Scripts/master/mprime.sh -q
sed -i '/^nohup / s/^/# /' mprime.sh # Do not start MPrime
sed -i '/^crontab / s/^/# /' mprime.sh # Do not create a cronjob
bash -- mprime.sh danc2 GCodeLabs

CUDALucas will likely take more than 12 hours depending on what GPU Google Colab is using, but you should easily be able to back up the files after the 12 hours and restore them the next day to continue working...

[Danc2050]

Answers and solutions to all my questions as usual.

I put in your updates and haven't tested them. I trust your script skills implicitly. I also added a section on using the TPU that Google Colab also offers, though I haven't researched this yet either.

[Danc2050]

I found a website that linked to a GitHub where an author has done this work already. The same author also has a script to setup an SSH tunnel, which would make things easier (e.g., run without a browser). Right now it is just doing Trial-factoring, but I am sure the script can be modified.

Furthermore, as I had mentioned in #5 this process can be done with IBM's supercomputer Watson for some amount of computing hours (they have some formula based on work done, I think). By adding to this script to sftp/scp the work off of the host machine of Watson before the allocation of compute time is finished (a suggestion you gave) then, in theory, a supercomputer could be used for a GIMPS project.