Writing first 100 prime numbers to a file using node.js

Question

I am trying to teach myself node.js (no javascript or real programming experience) and have hit a road block on one of the problems I am trying to solve. My goal is to write the

Answer 1

This works even beter if you preinitialize the list and skip testing the primality of multiples of 2

var primes = [2];
--nPrimes
for( var n = 3;  nPrimes > 0;  n += 2 )

I just finished very similar code for the Startup Engineering course homework @Coursera ;)