[QUOTE=petrw1;557187]This???

[CODE]echo Version: `cat version.inc`
Version: "v6.11-380-g79ea0cc"[/CODE][/QUOTE]

No no. At the terminal enter [C]g++ --version[/C]

Also try [C]g++[/C] followed by hitting tab a couple of times.

Same error
 

[QUOTE=petrw1;557186]Trying this....session is running; just not sure what it is doing or if it is actually running a P-1.

I'll keep you posted.[/QUOTE]

[CODE]./gpuowl.exe: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by ./gpuowl.exe)[/CODE]

[QUOTE=paulunderwood;557188]No no. At the terminal enter [C]g++ --version[/C]

Also try [C]g++[/C] followed by hitting tab a couple of times.[/QUOTE]

[CODE]---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-4-c48e476fe403> in <module>()
----> 1 g++ --version

NameError: name 'g' is not defined[/CODE]

[QUOTE=petrw1;557191][CODE]---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-4-c48e476fe403> in <module>()
----> 1 g++ --version

NameError: name 'g' is not defined[/CODE][/QUOTE]

This is not a bash terminal. Are you using "colab"?

[QUOTE=paulunderwood;557192]This is not a bash terminal. Are you using "colab"?[/QUOTE]

Yes; colab. Sorry for my lack of geekiness in this regard

[QUOTE=petrw1;557193]Yes; colab. Sorry for my lack of geekiness in this regard[/QUOTE]

I can't help. I have never used colab.

[QUOTE=paulunderwood;557194]I can't help. I have never used colab.[/QUOTE]

Ok thanks for trying

[QUOTE=petrw1;557184]./gpuowl.exe: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by ./gpuowl.exe)[/QUOTE]
Read post #36 in this thread.
[URL="https://mersenneforum.org/showthread.php?t=23117"]https://mersenneforum.org/showthread.php?t=23117[/URL]

Added the info about copying the libstdc* files back in each notebook to the original post #33:

[url]https://mersenneforum.org/showpost.php?p=555507&postcount=33[/url]

[QUOTE=paulunderwood;557194]I can't help. I have never used colab.[/QUOTE]

[CODE]!g++ --version[/CODE]

...on Colab gives:[CODE]g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0[/CODE]

Proof failure
 

The second proof failure is here: [URL="https://www.mersenne.org/report_exponent/?exp_lo=108979853&exp_hi=&full=1"]108979853[/URL]

I do not know if Bruno Victal is a forum member and can comment on what may have happened.