At least pick a prime number
but 153? Is there some aversion to round numbers in base 10 math? Master triangle math the motivation? Why 153?
It might be interesting for reform of the Pennylvania legislature to go just a bit further than just reducing the number by 50 or so. Would it be too much to try and impose a little more order on the whole system? Don't answer that. Our neighbors to the west in Ohio actually have a much more rational legislative structure. 99 members make up their house of representaives while there are 33 senators. The big difference is that the 3 to 1 ratio in Ohio is how the districts are spatially defined. Each senate district is made up of exactly the 3 general assembly districts which are coterminus in perfect tessellation. Just saying that if the proposed number of general assembly districts for Pennsylvania was150 and not 153 then it could work out the same with the 50 Pennsylvania senate districts. A tweak in the proposed law on how the general assembly districts are drawn could create a structure much like Ohio's. Think how much clearer that would be? Who would want that?
Not to say all that goes on in Ohio makes sense to me. This current proposal to transfer Ohio's control of the wholesale liquor market to a nonprofit with a monetized bond payment is all too convoluted to figure out. Which is why I am waiting for someone to come up with a corollary to try in Pennsylvania.