For the highest value I’ll use the following variety of p4 in this demonstration.

To make continuous production of p4 per hour:

It takes 3 types of p3 to make one type of p4.

P2 -> p3 chain:

If it takes 2 types of p2 to make a p3, then it takes 6 factories making p3. But since it takes 2 hours to make enough units, 12 factories are needed to make enough p3 per hour.

12 x p3 factories.

To fuel those factories you need the p2.

P1->p2 chain:

It takes 2 p1 types to make a p2 type. And again it takes 2 hours to make enough units. To fuel 12 (p2->p3 factories) needs 48 (p1->p2) factories.

P0->p1 chain:

It takes 1 p0 to make 1 p1 and it takes 2 hours to make enough p1 to make a unit of p2.

96 p0->p1 factories.

If we assume we can fuel 8 p0->p1 factories per planet. Then

12 planets for p0 inputs. (P0->p1 @8 factories fully fueled)

4 planets with 12 p1->p2 factories.

1 planet with 12 p2->p3s factories and 1 continuously fueled p3->p4 factory.

K so the smallest number of planets likely per p4 is 18.

But, a properly made p3->p4 factory planet can continuously produce 14 p4 per hour.

Yes…you read that correctly.

One p3-p4 factory planet can produce 252 planets worth of production/farming.

A single account with IC level IV for all 3 characters can have 15 such planets.

A single account can leverage 3,780 to 4,536 (IC level V) planets of production.

That’s a TREMENDOUS amount of market power to p4 factory planets.

Were someone to know how to run 14 p3->p4 factories on a single planet.