Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 272: | \[{3^{272}-1\over2}\] | 25 × 5 × 172 × 41 × 103 × 137 × 193 × 307 × 1021 × 1871 × 34511 × 956353 × 5641553 × 23229617 × 1743831169 × 6458150122561<13> × 3833564416504313<16> × 2670091735108484737<19> × 1981703105982814843334309489<28> |