Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 63: | \[{13^{63}-1\over12}\] | 32 × 43 × 61 × 127 × 337 × 547 × 6301 × 825679 × 1609669 × 2714377 × 5229043 × 7327657 × 997294663 × 2617880963923<13> |