Is PS3 Slim 250GB downgradable?

Ok so first of all, sorry if it have already been asked, but I am desperate because it's a huge sale period in my country, and it's only this weekend.

First of all, I was planning to buy PS3 slim 320GB but the news one are only 3k models which are not jailbreak-able. But today, with this massive sale, I've seen also a PS3 slim 250GB which it was a cech-21xxB I guess(latest, as written here en(.)wikipedia(.)org(/)wiki(/)PlayStation_3 ), and I've see on the same site that it was out of production before 2011 began. Does that mean it's jailbreak-able? Please answer me, and if it's not, tell me a model from the slim category that is still jailbreak-able.

Have a look here SKU Models - PS3 Development Wiki

Ok thanks, but for example on this site it says the 3k series comes with 3.66 but a friend of mine bought a 3k series slim and it came with a version higher even than 3.66, so if is there anybody who bought a slim recently from the 2k series, 21xxB especially(250GB slim), I'd be happy if you can tell me the factory firmware it came with.

Quote:

---

Originally Posted by Goku1992

Anything over 3.55 you need a hardware flasher

---

There.