Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 493: | \[{3^{493}-1\over2}\] | 59 × 1871 × 28537 × 34511 × 20381027 × 135769072957854733<18> × 24461879114558805437371311641297107167592931037239137<53> × 1129640333764056177294439666404700255828107373415876970165296726317175020432573835347435530623066284493507472043821204220698159646195998669797221<145> |