Definition:Perfect Number/Historical Note/Mistake 1

Source Work

1997: David Wells: Curious and Interesting Numbers (2nd ed.):

The Dictionary

$28$

Mistake

The first $4$ perfect numbers, $6$, $28$, $496$ and $8218$, were known to the late Greeks.

That last number should be $8128$.

Interestingly and oddly, this is correct in the first edition of Curious and Interesting Numbers of $1986$.

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $28$