[1] small e cube root: exact=True -> b'CTF{sm4ll_e_m3ans_cub3_r00t}'
[2] Fermat: sau 0 buoc -> b'CTF{q_is_nextprime_of_p_oops}'
[3] factor n nho qua factordb -> b'CTF{factordb_1000003_x_1000033}'
