Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 93: | \[{31^{93}-1\over30}\] | 3 × 331 × 15799367012336491417<20> × 583404661652480206661058499237<30> × 31832165679517520595753203434274069882869<41> × 568972471024107865287021434301977158534824481<45> |