Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 163: | \[{5^{163}-1\over4}\] | 4599209 × 40100609 × 675775181 × 6582151087844246659<19> × 102556399583828574447011133455059<33> × 2541462766396986870745222882425433052891<40> |