On Friday, March 29, 2019 at 7:45:31 PM UTC-7, Jeff-Relf.Me wrote:

12.5 billion years ago, quasar J2157-3602 had the power of
695 trillion suns ( 2.66×10^41 Watts ).

OK, let's see a reference for this claim.

I would agree that J2157-3602 seems to be the biggest, baddest quasar of all...

https://astrobites.org/2018/06/11/th...r-of-them-all/

.... where we learn that "... J2157-3602’s black hole is growing faster than any other black hole discovered to date, feasting on a steady diet of two Suns worth of material per day."

This article clearly claims that this quasar is growing... so how is it that YOU claim it was even more powerful in the past?