import sys, re
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, gcd, log2
from itertools import accumulate, permutations, combinations, product
from operator import itemgetter, mul, add
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits
from bisect import bisect, bisect_left
from heapq import heappush, heappop
from functools import reduce, lru_cache
def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
def ZIP(n): return zip(*(MAP() for _ in range(n)))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
mod = 10 ** 9 + 7

def is_prime(num):
    """ 素数判定 """
    from math import sqrt
    if num < 2:
        return False
    if num in [2, 3, 5]:
        return True
    if num % 2 == 0 or num % 3 == 0 or num % 5 == 0:
        return False
    # 疑似素数(2でも3でも割り切れない数字)で次々に割っていく
    prime = 7
    step = 4
    num_sqrt = sqrt(num)
    while prime <= num_sqrt:
        if num % prime == 0:
            return False
        prime += step
        step = 6 - step
    return True

N = INT()

ans = [1]
prime = []
cnt = 0
n = 10**5+1
while cnt <= 10:
	if is_prime(n):
		cnt += 1
		prime.append(n)
	n += 1
suteki = []
for i, j in combinations(prime, 2):
	suteki.append(i*j)
for x in prime:
	suteki.append(x**2)
suteki.sort()
ans += suteki
print(ans[N-1])