Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 140: | \[2^{140}-1\] | 3 × 52 × 11 × 29 × 31 × 41 × 43 × 71 × 113 × 127 × 281 × 86171 × 122921 × 7416361 × 47392381 |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 140: | \[2^{140}-1\] | 3 × 52 × 11 × 29 × 31 × 41 × 43 × 71 × 113 × 127 × 281 × 86171 × 122921 × 7416361 × 47392381 |