import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

num = 10 ** 6 + 1 #適当に値を入れる
L = [1 for i in range(num)]; L[0] = 0; L[1] = 0
plist = []
for i in range(num):
	if L[i] == 1:
		plist.append(i); c = 2
		while i * c <= num - 1:
			L[i * c] = 0; c += 1

#処理内容
def main():
	N = int(input())
	table = []
	for i in plist:
		if 10 ** 5 + 1 <= i <= 10 ** 5 + 150:
			table.append(i)

	# print(table)
	M = len(table)
	anstable = [1]
	for i in range(M):
		for j in range(M):
			anstable.append(table[i] * table[j])

	anstable.sort()
	# print(anstable)
	print(anstable[N - 1])

if __name__ == '__main__':
	main()