gistfile1.txt

#!/usr/local/bin/node

//NOW WITH NODE.JS

n=2000000;
sumPrimes=0;
myPrimes = new Array();

// set all array values to true

for (i=2;i<=n;i++)
	{
	myPrimes[i]=true;
	}

// sieve of eratosthenes

for (i=2;i<=n/2;i++)
	{
	if (myPrimes[i])
		{
		for (j=2*i;j<=n;j+=i)
			{
			myPrimes[j]=false;
			}
		}	
	}
	
// add up unsieved primes	
	
for (i=2;i<=n;i++)
	{
	if(myPrimes[i])
		{
		sumPrimes+=i;
		}
	}
	
console.log(sumPrimes);	

Yes- it is smart to use just one loop!