Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
353: | \[{3^{353}-1\over2}\] | 509027 × 4088777503007<13> × 637438988132166262617141124175522937058461420664876184853243951510526572254771304187233297219026449409899910981267893129258980950384337454306503948949<150> |