Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 198: | \[{3^{198}-1\over2}\] | 22 × 7 × 13 × 19 × 23 × 37 × 67 × 199 × 397 × 661 × 757 × 3851 × 4357 × 25411 × 176419 × 3186217 × 337448233 × 2413941289 × 378450588583<12> × 12812432238302009985937<23> |