Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 547: | \[2^{547}-1\] | 5471 × 172720604638150729<18> × 157552196128597543991<21> × 3094370432032805355177230433270065636934209000089709476056046201975893944504526523646181882472019182454441940262575164313583<124> |