Square of Small Repunit is Palindromic/Mistake/Second Edition
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Source Work
1997: David Wells: Curious and Interesting Numbers (2nd ed.):
- The Dictionary
- $1,111,111,111,111,111,111$
Mistake
- The squares of repunits make a pretty pattern:
- For example: ... $1,111,111,111^2 = 12,345,678,900,987,654,321$
Correction
That should read:
- $1,111,111,111^2 = 1,234,567,900,987,654,321$
There is an extra $8$ in the square where it should not be.
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $1,111,111,111,111,111,111$