p=[]
for i in range(100001,111111,2):
    for j in range(3,int(i**0.5)+1,2):
        if i%j==0:      break
    else:
        p+=[i]
        if len(p)>5:    break
pz=[0,1]+sorted([i*j for i in p for j in p if i<=j])
print(pz[int(input())])