7.py

def prime(x):
  y=0
  if(x==2 or x==3):
    return True
  for j in range(2,int(x**0.5+1)):
    if(x%j==0):
      return False
    else:
      y=1
  if(y==1):
    return True
    
x=0    
i=2
while x<10001:
  if(prime(i)):
    x=x+1
  i=i+1
print i-1