Timeline for Can $N^2$ have only digits 0 and 1, other than $N=10^k$?
Current License: CC BY-SA 2.5
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 11, 2009 at 21:46 | history | edited | Ilya Nikokoshev | CC BY-SA 2.5 |
add up to 20
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| Oct 11, 2009 at 21:05 | history | answered | Ilya Nikokoshev | CC BY-SA 2.5 |