Ex Machina (2014)

 

#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

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