Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
238: | \[{3^{238}-1\over2}\] | 22 × 103 × 239 × 307 × 547 × 1021 × 1093 × 1871 × 34511 × 7719769 × 44626806191326911791<20> × 397881837642577477902049<24> × 1098440018152695917905622020432593239209<40> |