Due to this challenge I came to know that `from Crypto.Util.number import *long_to_bytes()` has some bugs to be fixed, due to which I wasted so much of time. The idea to solve the challenge is to apply hastad's braodcast attack. You can learn about it [here](http://crypto.stanford.edu/~dabo/pubs/papers/RSA-survey.pdf).
Here is my complete [writeup](https://www.zsquare.org/post/wpictf-2020-illuminati-confirmed-write-up).