Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 458: | \[{4^{458}-1\over3}\] | 5 × 2749 × 1504073 × 5523481 × 18754643 × 20492753 × 602633653 × 33074236421<11> × 84948746297<11> × 6211454306149<13> × 59833457464970183<17> × 44185520789894155033573<23> × 979593335915791354913977669<27> × 21535805979875847804128272826013997<35> × 467795120187583723534280000348743236593<39> × 15333417141003794339164342447265426158851946182451963484372297<62> |