Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 388: | \[{3^{388}-1\over2}\] | 23 × 5 × 389 × 76631 × 459991849 × 503803759819<12> × 2549755542947<13> × 20591603926857377806745611<26> × 48845962828028421155731228333<29> × 1209361321548310091770485682269470852086753<43> × 77449343291186907889503299808279247610860106861<47> |