Rating:
RSA given N, e, ct.
Factor N (Factor DB has the full factorization). N turns out to be made of just two prime factors, so just standard RSA after you get p and q from factordb.
[Full writeup](https://bigpick.github.io/TodayILearned/articles/2020-06/nahamConCTF-writeups#ooo-la-la)