Prime numbers

Does anyone else find the Sieve of Eratosthenes and the ilk a totally pointless concept?

It like over optimising a Java program that could be written in C in a short space of time.

>>72
>Physical determinism is still an open question.

No, it isn't.  Chaotic systems require infinitely precise knowledge of their state to predict correctly.  You may say, "Aha! Reality is quantized, so it's possible to know those states with infinite precision!"  Here, the Heisenberg Uncertainty Principle is useful.

All that is required to disprove determinism is a single physically realizable chaotic system whose future state depends non-continuously on the position and momentum of a particle.