Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 221: | \[2^{221}-1\] | 1327 × 8191 × 131071 × 2365454398418399772605086209214363458552839866247069233<55> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 221: | \[2^{221}-1\] | 1327 × 8191 × 131071 × 2365454398418399772605086209214363458552839866247069233<55> |