YOU CAME ? I WAS WAITING FOR YOU LEVEL 4 !! HAHA

Warning !! High level detected, show me what you can do

what did the 3 keys left behind
I may help u by saying:

The loudest answers are rarely the first ones you hear
Some echoes don't repeat sounds, they repeat choices
Every key leaves a trace, even after the door is opened
Three doors have already opened for you
Nothing was written without purpose
Not every answer is a word
None of them are behind you
Those who only move forward will never reach the truth
[-] ACCESS DENIED: CORE LOCKDOWN INITIATED [-]
SECURITY EMERGENCY: LEVEL 5 ROOT OVERRIDE IN PROGRESS
THE GRAND FINALE: CENTRAL CORES DESTRUCTION _
[!] Initializing root injection vector...
[+] Bypassing Level 4 encryption structures... Done.
[FINAL CODE MATRIX]:

You stand at the edge of the absolute void.
The final core does not accept words, nor simple single digits.
Look closely at the rhythm of the machine.
The ultimate password is hidden within the echoes of your journey.
The number of steps taken, multiplied by the first prime trace left in your mind.
[-] INVALID ROOT KEY: BACKTRACE PROTOCOL ACTIVATED [-]
SYSTEM STATUS: TOTAL DOMINATION SECURED
OPERATOR STATUS
ELITE HACKER
SYSTEM CORES
DESTROYED (100%)
RANKING
GOD MODE