PrimeNumber.kt

fun main(args: Array<String>) {
    val generator = sequence {
        var i = 2L
        while (true) {
            yield(i)
            i++
        }
    }

    val iterator = generator.iterator()


    val millis = measureTimeMillis {
        runBlocking {
            repeat(1000)
            {
                launch {
                    repeat(5000)
                    {
                        val i = iterator.next()
                        val prime = isPrime(i)
                        if (prime) {
                            println(i)
                        }
                    }
                }
            }
        }
    }
    println("Total ms: $millis")
}

fun isPrime(num: Long): Boolean {
    val sqrt = sqrt(num.toDouble()).toLong()
    for (i in 2..sqrt) {
        if (num % i == 0L)
            return false
    }
    return true
}