Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 445: | \[{4^{445}-1\over3}\] | 11 × 31 × 179 × 2671 × 7121 × 62020897 × 131865932411<12> × 18584774046020617<17> × 40853155149612675915761<23> × 618970019642690137449562111<27> × 1460384540571001412284141831845453026637206635511<49> × 1213879697009617667840625625239307278583085260903037111<55> × 347845646370185161095967265379428963144557189176373959511073050525241<69> |