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How many Planck times would there be from the Big Bang to the Big Rip? (approx.) Does this number have any numerical significance to mathematics?

If you had a CPU clock which had a timer counting from the big bang. How many bits would the CPU have to be?

If you took the number of 4 dimensional plank volumes from the big bang to the big rip bounded by the visible universe at any time. (which would give a double-cone shape.) What number is this? How many bits for a CPU need to express this number.

I'm just thinking about how what the maximum number of bits an immortal computer would need and not run into any Y2K problems!

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  • $\begingroup$ When is the 'big rip'? $\endgroup$ – Alfred Centauri Nov 28 '16 at 3:10
  • $\begingroup$ The end of the Universe $\endgroup$ – zooby Nov 28 '16 at 3:11
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    $\begingroup$ When is the end of the Universe? $\endgroup$ – Alfred Centauri Nov 28 '16 at 3:14
  • $\begingroup$ @zooby +1 explained: this question might not be all on the hard-core side of physics, but it's absolutely at the heart of why we even have physics, the nature of it embodies the true spirit of physics; too bad I couldn't give it +2. $\endgroup$ – Charles Rockafellor Jan 21 at 17:08
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Googling rather than calculating, I see it asserted that the age of the universe is about 10^60 Planck times, and that the size of the observable universe is above 10^180 Planck volumes. As for a big rip, it could happen any time from tomorrow to a googolplex years in the future to never. So maybe you can set a crude lower bound on the number of "Planck hypervolumes" needed so far, as about 10^240, or about 2^800.

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  • $\begingroup$ Interesting. So I think one might use a 512 or 1024-bit computer. $\endgroup$ – zooby Jan 21 at 23:13

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