import sys
import itertools

sys.setrecursionlimit(10 ** 8)

input = sys.stdin.readline


def is_prime(n):
    if n == 1:
        return False
    for i in range(2, int(n ** 0.5) + 1):
        if n % i == 0:
            return False
    return True


def main():
    N = int(input())

    prime = []
    for i in range(10 ** 5 + 1, 10 ** 6):
        if is_prime(i):
            prime.append(i)
            if len(prime) == 10:
                break

    x = []
    x.append(1)
    for a, b in itertools.combinations(prime, 2):
        x.append(a * b)

    x.sort()
    print(x[N - 1])




if __name__ == '__main__':
    main()