Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
71: | \[{11^{71}-1\over10}\] | 1847 × 64327 × 159248456569<12> × 1273880539247<13> × 360426336941693434048414944508078750920763<42> |