Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 107: | \[{4^{107}-1\over3}\] | 643 × 84115747449047881488635567801<29> × 162259276829213363391578010288127<33> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 107: | \[{4^{107}-1\over3}\] | 643 × 84115747449047881488635567801<29> × 162259276829213363391578010288127<33> |