Just about every article everywhere on the GBU-57 says that the B-2 can carry two of these 30,000 lb bombs.
However, if you look up the ordinance payload capacity of the B-2, you will see that it is reported as either 40,000 lbs or 20,000 kg. Most say 40,000 lbs, including
this Air Force link.
This Reuters article contains this nonsense...
"Its payload capacity of more than 40,000 pounds allows the aircraft to carry a diverse array of conventional and nuclear weapons. The bomber's internal weapons bays are specifically designed to maintain stealth characteristics while accommodating large ordnance loads which could include two GBU-57A/B MOP (Massive Ordnance Penetrator), a 30,000-pound precision-guided "bunker buster" bomb."