Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 419: | \[{3^{419}-1\over2}\] | 839 × 596113491371<12> × 2151506053058735838822709777<28> × 654885891476141016165461375447<30> × 1593204794095231348491880857761413<34> × 496097134087521646396618935298341361<36> × 73610249666732076485411273083313900034585093256720630770971<59> |