Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 83: | \[{10^{83}-1\over9}\] | 3367147378267<13> × 9512538508624154373682136329<28> × 346895716385857804544741137394505425384477<42> |