No-one knows the answer to that question
George Lucas was only after making the statement that the Millennium Falcon is very fast, not how fast it is.
The mention of "Parsecs" is in all likely probability a mistake, with Lucas assuming that "Parsecs" had something to do with seconds, and "Par" being a prefix akin to kilo- or Mega-. It sounded cool, it had something to do with space, so he used it. Just like Douglas Adams's "fourty-two" or Nick Kershaw's "The Riddle" it had no actual meaning, it just sounded good for the time being and plugged up a verbal hole that needed to be filled, and any attempt to interpret those things as something substantial and meaningful is doomed to fail.
Later — as your linked answers suggest — they tried to fix this and make it less willy-nilly, probably because the nerdy and more physics savvy fans started to object. But it did not turn up any better, with embarrassing concepts such as "standard timeunits" or trying to say that it had something to do with skirting the rims of black holes and whatnot.
And when we start to look at other star ships in the Star Wars universe as well, then it becomes very obvious that they are all Travelling at The Speed of Plot.
As I stated in another answer, here is an example of that phenomenon:
the Empire has time to blow up a planet, make a dash to Dantooine, search the planet, find a rebel base, examine it close enough to conclude that "it has been deserted for some time", and then report back to the Death Star... all squeezed in between the time Obi-Wan "fear[s] something terrible has happened" and the Falcon arriving in the rubble-field that is formerly known as Alderaan.
So Lucas is not at all bothering with actual speeds and making the numbers come out right. Instead he uses the space version of Gandalf's Principle of Wizardly Timeliness:
A star ship is never late, nor is it early, it arrives precisely when the author means it to.
In conclusion: no-one knows how many hours, minutes and seconds the Millenium Falcon's Kessel Run actually took, not even George Lucas himself, because he was not interested in specifying it, since it was quite simply not at all important to the story.