# Running Cocalc overnight

Hi everyone!

I am running some codes on Cocalc. I have a subscription so the codes run quite smoothly for small primes. When these primes get bigger, the codes take a quite long time to run. For example, one particular shell for $p \in [1000, 1100]$ took one hour to return the results. This requires me to occasionally touch the keyboard to prevent Cocalc from being stopped. Is there a way to resolve this problem? In particular, I do hope to run several shells simultaneously (so the total running time could be 10 hours).