Ex Machina Easter Egg ;)

BlueBook.py

#BlueBook code decryption
import sys

def sieve(n):
   x = [1] * n
   x[1] = 0
   for i in range(2,n/2):
           j = 2 * i
           while j < n:
                   x[j]=0
                   j = j+i
   return x   
   
def prime(n,x):
   i = 1
   j = 1
   while j <= n:
           if x[i] == 1:
                   j = j + 1
           i = i + 1
   return i - 1
x=sieve(10000)
code = [1206,301,384,5]
key =[1,1,2,2,]    
sys.stdout.write("".join(chr(i) for i in [73,83,66,78,32,61,32]))
for i in range (0,4):
   sys.stdout.write(str(prime(code[i],x)-key[i]))    
print