import kotlin.math.roundToInt

fun main(args: Array<String>) {
    var count = 0
    var startAt = 84 * 100 + 100000
    var iterations = 0
    while(iterations <= 1000) {
        for(i in 2 until startAt) if(startAt % i == 0) {
            count++
            break
        }
        startAt += 17
        iterations++
    }
    println(count)
}