Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 327: | \[{4^{327}-1\over3}\] | 3 × 7 × 666427 × 104124649 × 745988807 × 6927735019<10> × 20597276734348736647<20> × 33157029794959983067039<23> × 88116165754061081804047<23> × 870035986098720987332873<24> × 2077756847362348863128179<25> × 30414028470765822165976581508161866432602988327347<50> |