Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 725: | \[2^{725}-1\] | 31 × 233 × 601 × 1103 × 1801 × 2089 × 448477751 × 245573800535260692993906074551<30> × 177457540153273192963355393450351<33> × 2679895157783862814690027494144991<34> × 3306918468362395868346324514646813146301551<43> × 56567687035285545626766259407689093973050946051397638001<56> |