Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 297: | \[{4^{297}-1\over3}\] | 33 × 7 × 19 × 23 × 67 × 73 × 89 × 199 × 683 × 5347 × 20857 × 23761 × 87211 × 153649 × 262657 × 599479 × 694387 × 8950393 × 33057806959<11> × 6215074747201<13> × 242099935645987<15> × 14973866897175265228063698945547<32> × 170886618823141738081830950807292771648313599433<48> |