check if a number is a prime number

primechecker.js

function primeChecker(n) {
  var divisor = 2;
  var isPrime = true;
  
  while(n > divisor){
    if(n % divisor === 0){
      isPrime = false; // not a PRIME!!!
    } else {
      divisor++;
    }
  }
  
  console.log(isPrime);
}

primeChecker(137)
primeChecker(237)