Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 281: | \[2^{281}-1\] | 80929 × 48009215293052652841860443273079338843737271906291675944391068955229998769420319<80> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 281: | \[2^{281}-1\] | 80929 × 48009215293052652841860443273079338843737271906291675944391068955229998769420319<80> |