# What are the limits of the Prime-functions? [duplicate]

Will Prime and PrimePi test up to 3 * 10^12? Where can I find the limits for these funtions? Also, what are the limits for PrimeOmega and PrimeNu? More generally, is there any documentation that gives limits for all of Mathematica's functions?
• Ilian Gachevski mentions over at wolfram community that PrimeQ is valid up to $2^{64}$ – ssch Dec 14 '13 at 12:25