# Why can't I use OmegaPrime to find the Limit of Prime[n]? [duplicate]

What are the limits of the Prime-functions?

What is so special about Prime?

which gave an answer for earlier versions of Mathematica. Yet when I try to input either OmegaPrime or OmegaPrimePi, and then hit enter, I don't get any numbers. I have tried using N[OmegaPrime] to force a number. It's as if the functions have been removed in version 9.0 . And someone mentioned using PrimeOmega, so I tried that and N[PrimeOmega]. I would also like to know if version 10.0 has a higher Prime[n] so I can decide on whether to upgrade.

## marked as duplicate by ilian, dr.blochwave, Szabolcs, MarcoB, C. E.Sep 14 '15 at 17:18

• OmegaPrime never existed in any version of Mathematica; you misunderstood Artes's statement. This number was found by him using a divide-and-conquer method. It is not a value tabulated in Mathematica itself but depends on the implementation of Prime. – Oleksandr R. Sep 14 '15 at 16:08
• Thanks, but since the question has been marked as a duplicate, it is not possible to add an answer any more. It doesn't matter about the points. Actually, I was unsure about whether your question concerned OmegaPrime specifically, or the limits of Prime more generally. I don't know if the latter have been changed for Mathematica 10 (although I suspect not, given Daniel Lichtblau's remarks), but if the limitations are your main concern, the other thread seems to cover this topic well enough and your question can legitimately be considered a duplicate. – Oleksandr R. Sep 17 '15 at 22:12