4110
I first learned about the 4,110 plan, pronounced, 41-10, from Susan Shogren-Smith who asked in the year 2021, Have you heard of Philip Parrish's 41-10 plan?
The number is specific.
It refers to the number of voting precincts in Minnesota.
This number has since changed to 4,100.
https://www.sos.state.mn.us/election-administration-campaigns/data-maps/voting-precincts/
The idea was, if there can be in each precinct at least a small number of people standing up politically, then local change has a greater likelihood of succeeding.