// https://projecteuler.net/problem=10

const isPrime = (number) => {
  if (number === 2) return true
  if (number % 2 === 0) return false

  for (let j = 3; j * j <= number; j += 2) {
    if (number % j === 0) {
      return false
    }
  }
  return true
}

con