Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 117: | \[{4^{117}-1\over3}\] | 32 × 7 × 19 × 73 × 79 × 937 × 2731 × 6553 × 8191 × 86113 × 121369 × 22366891 × 7830118297<10> × 5302306226370307681801<22> |