(adsbygoogle = window.adsbygoogle || []).push({}); All the firmwares that you ever had on your psp.
Mine is kind of long since i like to play around and test out new things with my PSP

1.5,2.00,2.81,3.03,1.5,3.03oe-c,3.40oe-a,3.52m33,3.40oe-a,3.52m33,3.52m334,3.71m33,1.5,3.52m33,3.52m33-4,
3.80m33,3.80m33-5,brick,1.5(pandora),3.80m33,3.80m33-5,3.90m33-3,4.01m33,4.01m33-2,brick,1.5(pandora),3.90m33,90m33-3

1.50 . 2.00 Lcs 2.00 tiff exploit. 2.50 oe 3.00 oe 3.40 updated to ofw3.50 . 3.70 . 3.80 . 3.90 3.51m33 3.70m33 3.80m33 4.01 m33 and 5.00m33

Gawd, I can't remember. Well, I got it the first day it came out (and am still playing it; best handheld ever!), and I kept updating the firmware up until around this time last year when a buddy hacked it for me. So whatever it was downgraded to, its still that version now...