Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 395: | \[{3^{395}-1\over2}\] | 112 × 5531 × 432853009 × 392038110671<12> × 145171177264407947<18> × 231040361073709413931057501<27> × 6434943291436769366927146921<28> × 15726644297407162541884251721<29> × 5478828409328216056558228587181<31> × 68733921233280690592799804650571<32> |