John_pollard

Download file cert dari picoctf

Akses situs https://redkestrel.co.uk/tools/decoder#decoder-results , lalu upload file cert yang telah diunduh dan klik Decode

Perhatikan detail certificate, lalu cari modulus

Jika sudah ketemu, salin modulus lalu akses link https://factordb.com/index.php?query=4966306421059967 dan paste nilai modulus ke inputan

Klik factorize

Cek di result, terapkan hasilnya ke picoCTF{} jadi begini picoCTF{73176001, HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=67867967” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001” HYPERLINK “https://factordb.com/index.php?id=73176001″67867967} => Ini jawabannya

picoCTF{73176001,67867967}