Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 203: | \[{5^{203}-1\over4}\] | 59 × 19531 × 35671 × 493291 × 22125996444329<14> × 4978655062910170670969991331<28> × 870644868196664798437471040084684397998331787855406407455272073598393651325508166801<84> |