Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 358: | \[{4^{358}-1\over3}\] | 5 × 359 × 1433 × 31815461 × 1301260549 × 58745093521<11> × 416115013830990336221<21> × 11575709336636595278866333<26> × 4347868190665879373495950562775707707143803<43> × 588850381287433028279084110474400181861465037<45> × 1489459109360039866456940197095433721664951999121<49> |