When playing draw poker, you only need to select 10 cards from the deck, because the other cards will never be played. So that's 52⋅51⋅…⋅43 = 57,407,703,889,536

When playing draw poker, you only need to select 10 cards from the deck, because the other cards will never be played. So that's 52⋅51⋅…⋅43 = 57,407,703,889,536,000, which needs 56 bits.