Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 304: | \[{3^{304}-1\over2}\] | 25 × 5 × 17 × 41 × 193 × 761 × 1597 × 2851 × 31769 × 101917 × 363889 × 3302353 × 5301533 × 25480398173<11> × 278733912072436804273<21> × 507451442443788899165240329482668362950054541832902585238747279444641<69> |