ATTO
| Date | Clue |
|---|---|
| 2012-05-12 | Quintillionth: Prefix |
| 2009-02-15 | Quintillionth: Prefix |
| 2008-11-22 | Quintillionth: Prefix |
| 2007-06-29 | Quintillionth: Prefix |
| 2006-02-10 | Quintillionth: Prefix |
| 2005-08-27 | One-quintillionth: Prefix |
| 2004-08-06 | Quintillionth: Prefix |
| 1997-04-18 | One-quintillionth: Prefix |