This is where Marks Rpi Cluster is as of the 28th of May for Einstein@home. Total credit is 23,448,504 and recent average is 33,648 credits.
As you can see I restarted the cluster around 60 days ago, credit went up and for the last 40 days or so its been fairly steady with a few bumps as I allocate some of the cluster to Asteroids@home work.
Cluster make up
As of the 28th of May the cluster is made up of:
3 x Pi4 (2GB) as support nodes
24 x Pi4 (8GB) as compute nodes
There isn't any special software handling the work. Each compute node is running an instance of BOINC which downloads work units, runs the project science application and returns the results.