According to case 166 of The Codeless Code:
It is interesting to note that current physics predicts the heat death of the Universe in no less than 10^100 years, with a subsequent Big Bang arising perhaps in another 10^(10^56) years. This means that in order to display our uptime in seconds right before rebooting the Universe, we would need time_t to have (3.32e56 + 30) bits. Since planet Earth only has about 1.33e50 atoms to play with, we’d need about 2.5 million Earths (or roughly one G-type main-sequence star) to build a simple register alone. Now, where can we get a G-type star? Hmmmmm...
Obviously, that's far too big for us to build at our current level of technology. But this is the future, and we've managed to get hold of one spare Earth - and a place in space to store it nearby.
Using only this spare planet, what future possibilities for data storage might we use, without exceeding the limit of the number of atoms in the Earth?
(Yes, as it stands this is idea generation: to nullify that, I will objectively judge the best answer to be the one that uses the fewest atoms.)