Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 126: | \[{4^{126}-1\over3}\] | 32 × 5 × 72 × 13 × 19 × 29 × 37 × 43 × 73 × 109 × 113 × 127 × 337 × 1429 × 5419 × 14449 × 92737 × 649657 × 40388473189<11> × 77158673929<11> × 118750098349<12> |