Maximum value of PCR

Question

What is the maximum value of Program Clock Reference(PCR) in MPEG?

I understand that it is derived from a 27MHz clock, periodically loaded into a 42bit register.

Answer 1

PCR_ext(i) value should be 0 .. 299.

So the maximum PCR = (2^33-1)*300+299 = 2,576,980,377,599