// first 20 primes
console.log(primeGenerator(20, true));

// primes between 100 and 150
console.log(primeGenerator([100, 150], true));

// numbers of primes between 7700 and 8000
console.log(primeGenerator([7700, 8000], false));

// the 10,000th prime
console.log(primeGenerator(10000, false));