Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 201: | \[{5^{201}-1\over4}\] | 31 × 269 × 1609 × 26399 × 2454335007529<13> × 604088623657497125653141<24> × 1248228732195063112609361470351<31> × 118665565193553599548973071707180632259340693379855907500925271<63> |