Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 715: | \[2^{715}-1\] | 23 × 31 × 89 × 881 × 3191 × 8191 × 201961 × 724153 × 158822951431<12> × 145295143558111<15> × 249602191565465311<18> × 598887853030285391<18> × 5782172113400990737<19> × 40437156024702109576962112690515640573348784018939257192870865875822732631168387328482154414164150624064713711<110> |