| Clue | Source | Date |
|---|---|---|
| Nero's 555 | LA Times Mini | 08 Apr 2025 |
| 555, to Nero | ||
| 111 qvintupled | Newsday | 18 Sep 2020 |
| 555, to Ovid | Eugene Sheffer | 28 Aug 2020 |
| CXI + CXI + CXI + CXI + CXI | Wall Street Journal | 14 Jun 2018 |
| CXI + CXI + CXI + CXI + CXI | ||
| 555, to Flavius | ||
| Nero's 555 | ||
| Multiple of CXI | ||
| XXXVII x XV | ||
| Five fifty-five in old Rome? | ||
| Sixth century date | ||
| Mid 6th-century date | ||
| CXI × V |