Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 377: | \[{4^{377}-1\over3}\] | 59 × 233 × 1103 × 2089 × 2731 × 5279 × 8191 × 3033169 × 13454377 × 148055441 × 359661017 × 249018815918315199700031851161772880156221637084521986234342836024160025575777017<81> × 15604620003748987137563684369946433749429548952479111489128424163566077973414124705335003435083<95> |