Question about Jailbreak on ps3 4.55

Hi, i really want to jailbreak my ps3 so i searched for some information.
I found out that u need an e3 flasher to downgrade to 3.55 and then jailbreak and spoof.
But yesterday i saw a few clips on youtube about a new jailbreak on 4.55 oes anyone know if this is dex or cex ?
Is this jailbreak really possible because allot of people say it does please leave a reply thanks.