Prime Numbers

I wouldn't be suprised if this question had been posted earlier. But i would like to streamline it a little bit so that i get to know what i m trying to find out......

So if i write a Loop to calculate Prime Numbers in order, is there any way possible for this to happen in a shorter period of time.

the loop that i constructed took about 11hrs on a Win 7 2GB ram machine to calculate about 150,000 primes, could this be done any faster................


Thanks again for any inputs whatsoever.