cryptomedium

P*Q=ban

spbctf

Task: RSA with very large modulus n (4119 bits). Solution: Lookup n in factordb.com to find composite (non-prime) factors p and q; the flag is one of the factors.

$ ls tags/ techniques/
rsafactordbcomposite_factorslarge_modulus
factordb_lookupcomposite_rsa
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