Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 163: | \[{13^{163}-1\over12}\] | 8693117 × 1279033291 × 57483449583854824247<20> × 4875116341807165998646938205236867428544376329495880618235104173530332181117051614859541340918734334357598190495004083440135137484091025227159487<145> |