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.

>>74
If you can't measure it, you can't DETERMINE it.  There's no way to DETERMINE the future state of many systems.  Of course, they will be in some state in the future, but that state isn't DETERMINED.  (Did you notice you were replying to a post about determinism?)