# Important pi question (when these numbers will reoccur)

by 9I.
Tags: important, numbers, reoccur
 Mentor P: 18,346 We don't even know if it will happen again. But if ##\pi## is a normal number, meaning that all finite sequences are equally likely (which has not been proven yet, but is suspected strongly to be the case), then for a given sequence of ##n## numbers to show up, you will have to go approximately $$\frac{10}{9}(10^n - 1)\approx 10^n$$ digits far in the sequence. So if you want to see the 427,238,911 again, you will have to wait approximately ##10^{427238911}## digits. In comparison, the number of particles in the observable universe is approximately ##10^{80}##, so you'll probably never be able to find this sequence in ##\pi## since there's not enough space to store the digits.