Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 357: | \[2^{357}-1\] | 72 × 103 × 127 × 239 × 337 × 2143 × 4999 × 11119 × 20231 × 131071 × 62983048367<11> × 131105292137<12> × 245262248913715001137177<24> × 8889432124593512497963252165417<31> |