Found the following in an mprime run log immediately after starting mprime v30.6b4:
Code:
[Main thread Sep 30 12:04] Mersenne number primality test program version 30.6 [Main thread Sep 30 12:04] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 55 MB
[Main thread Sep 30 12:04] Starting worker.
[Main thread Sep 30 12:04] Stopping all worker windows.
[Work thread Sep 30 12:04] Worker starting
[Work thread Sep 30 12:04] Worker stopped.
[Main thread Sep 30 12:04] Execution halted.
[Main thread Sep 30 12:04] Choose Test/Continue to restart
That's hard to do when it's a Google Colab background process, no menu, no keyboard, no means of input.
Stop and Continue the notebook section seems to have worked.
No idea what caused the immediate stop.