getResults.js

function getResults(a, b) {
  var square1 = a * a;
  var double2 = b * 2;
  var sum = square1 + double2;
  var answer = sum - (a * 2);
  if (answer % 2 === 0) {  // is even
    answer *= 5;
  } else {
    answer *= 10;
  }
  answer += 101;
  answer = isPrime(answer) ? 1 : answer
  return answer;
}

function isPrime(num) {
  for (var i = 2; i < parseInt(num/2); i++) {
    if (num % i === 0) {
      return false;
    }
  }
  return num >= 1;
}
console.log(getResults(5, 10));        // 451