Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 333: | \[2^{333}-1\] | 7 × 73 × 223 × 1999 × 10657 × 169831 × 321679 × 1238761 × 26295457 × 36085879 × 199381087 × 319020217 × 616318177 × 698962539799<12> × 4096460559560875111<19> |