limit = input(">")
print [x for x in range(2**limit if limit<10 else 1024) if x > 1 and len([y for y in range(2,x) if x%y ==0])==0][:limit]


##############################

limit = 1000
print [x for x in range(limit) if x > 2 and len([y for y in range(2,x) if x%y ==0])==0]