It is

#### (2^{74,207,281} – 1)( 2^{74,207,280})

The formula for PERFECT numbers is P = (2n– 1)( 2n-1) providing

(2^{n}– 1) is a prime.

The last digit of the largest known PERFECT number

should be 1 x 6 = 6. It is!! All PERFECT numbers end is 6 or 8.