Definition:Perfect Number/Historical Note/Mistake 1
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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): $28$