Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 147: | \[{3^{147}-1\over2}\] | 13 × 491 × 1093 × 4019 × 8233 × 47041 × 51157 × 131713 × 368089 × 254395969103901649521223867932173929<36> |