I am following Mr. Snow’s tutorial and he mentions we could probably refactor the code to use .filter instead of a for loop. I think I must be getting close, because the ` console.log(prime);`

actually has the desired value and I think I could even delete the `return prime.reduce`

on line 21, I’ve even tried moving different versions of `return prime`

up to line 16… but the more I try to shake this lint error, I start getting .reduce on an undefined array, so I’ve tried adding 1,2 or 3 as a starting value to the starting array… the more I try to work around this bug, the more I tend to be breaking everything else…

```
function sumPrimes(num) {
//create array
var prime = [];
prime = prime.filter( (n) => {
let m = n-1;
while (m > 1 && m >= Math.sqrt(n)) {
if ((n % m) === 0)
return false;
m--;
}
console.log(prime);
return true;
}
//reduce to add numbers in array
return prime.reduce(function(a, b) {
return a + b;
});
}
sumPrimes(10); // should return a number.
sumPrimes(10); // should return 17.
sumPrimes(977); // should return 73156.
```