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.

>>68
Physical determinism is still an open question.

As far as 'random' goes, there's hardly a use case for anything stronger than "unpredictable in principle" which particle decay gives us--determinism or no, we're excluded (in principle) from ever being able to predict decay events beyond a certain established accuracy.