Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{10^{91}-1\over9}\] | 53 × 79 × 239 × 547 × 4649 × 14197 × 17837 × 4262077 × 265371653 × 43442141653<11> × 316877365766624209<18> × 110742186470530054291318013<27> |