Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 637: | \[2^{637}-1\] | 127 × 911 × 3823 × 8191 × 15289 × 112901153 × 23140471537<11> × 31945881241<11> × 4432676798593<13> × 153925026222241<15> × 8573192048327176271<19> × 6044274266901603399200353<25> × 153472677405951306470238401460959<33> × 22734546382983841003979491437223900758487279<44> |