This question is adressed to the older versions where farlands like the following image exists. Beta 1.7.3.
My question is not about how big is a Minecraft world, my question is about what can happens if you keep flying through the farlands for a lot of time.
Will the game crash due to the HUGE data values?
Also, does the world size depends about if a computer is 64 or 32 bits?
Best Answer
Per the Minecraft Wiki's entry on Far Lands:
So, yes - eventually, if you go far enough into the Far Lands, Minecraft becomes less and less responsive to the point of the only solution being to kill the process.
As for whether a 64-bit processor vs 32-bit changes anything? Doubtful, although the trivia section does include this bit of info:
So while it sounds like it is conceivable to go that far, Minecraft would probably cease responding long before.