We can now find the largest known PERFECT Number! It is (274,207,281 – 1)( 274,207,280) The formula for PERFECT numbers is P = (2n– 1)( 2n-1) providing (2n– 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.
