Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 581: | \[{4^{581}-1\over3}\] | 43 × 127 × 167 × 499 × 1163 × 2657 × 18593 × 155377 × 219619 × 798037199 × 13455809771<11> × 52588634980729<14> × 175908273685537<15> × 57912614113275649087721<23> × 15444711420006203351165170879848557117713<41> × 2971973409500325953167938550558277137022719033111954012803581886623047449962315856161<85> × 88625379503308113870163817479116818523025223399242215471800784810025248381387984608067747463864839726134410700901664118330633<125> |