const input = 7489374923 function isPrimeNumber (num) { if (num === 2 || num === 3 || num === 5 || num === 7) return true if (num % 2 === 0) return false for (let i=3; i<num; i+=2) { if (num % i === 0 && i !== num) { console.log(`${num} is divisible by ${i}`) return false } } return true } const result = isPrimeNumber(input) console.log(result)