Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 215: | \[2^{215}-1\] | 31 × 431 × 1721 × 9719 × 2099863 × 731516431 × 514851898711<12> × 297927289744047764444862191<27> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 215: | \[2^{215}-1\] | 31 × 431 × 1721 × 9719 × 2099863 × 731516431 × 514851898711<12> × 297927289744047764444862191<27> |