hmmm...that list is wrong, Castle Bravo was not the largest, although impressive at Bikini.
The B41 (sometimes called Mk.41) was the biggest produced (500 units) and tested, yeilding 25 megatons. The two tested were one with a lead sheild (clean) and one with a uranium sheild (dirty) air dropped and drag-corrected by parachute.
Only thing bigger was the Soviet Tsar (50Mt)