Square of Small Repunit is Palindromic/Mistake/Second Edition

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): $1,111,111,111,111,111,111$