```python
import gmpy
import base64

def text2Int(text):
return reduce(lambda x, y : (x << 8) + y, map(ord, text))

e = 65537
c = text2Int(base64.b64decode('Cc0GtEY4nL7DhDukClWKaTHChrCVJeVVm3MJ+6hgiqaYUjbx9ArCrH0uzdfDqf4l81NAqV0fGtd8a9H4dlEQRykvOwpFpViK4qTU1H28nEMZ6O1Hnt9NrLxlSvpARZd8hxoJtXiwUbZI6rcI9lQwt+pJLvrvw2/Mz+fBMvrVPFONSYDH/lU0wy4jKbH0zl7zJ09+gCBo9oJ2Hqpsh0BkcS6ix5lDu/6JENG/ChC7jZGYWpte+QIkb/fQTwsw3tGIz1jWYhqQ8MrSxtGpyyPG9Oy/zGHIBEBDesS4r72D8n2mQExRnCH2KW5wz5hsM2TXYRILtJqWCOyv/AF56Ebg9A=='))
p = 36511974694593690272644354864534934200522045623187752384823594729275730789191680514905027084950729514148679507005058047146031869995768765034876499069680202424692876360895377987654388335335689563844006584610187090074654410815638237841872991488680663410743679302763304922852173164820002226109196761249018548478251723505481964749218302723593776180246783117481280725673997940309717028451914887375722437833384305529884261542397905220138488012276363046571670926597766521674838665982314321651508118240682649024780239598188845543243957916954287138820155843952556411235376764737602711594439293285811102883736229645274092478611
fi = p-1
d = gmpy.invert(e,fi)
plain = hex(pow(int(c),d,p))[2:]
flag = plain.decode("hex")
print flag

```

The Flag is The empire secret system has been exposed ! The top secret flag is : Flag{S1nGL3_PR1m3_M0duLUs_ATT4cK_TaK3d_D0wn_RSA_T0_A_Sym3tr1c_ALg0r1thm}

Original writeup (https://github.com/rayenmessaoudi/Write-ups-CTF/blob/master/Ctfsecurinets2018/The%20worst%20RSA%20Joke.md).