Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 158: | \[{7^{158}-1\over6}\] | 23 × 317 × 2874811 × 7573763065938754357<19> × 913242407367610843676812931<27> × 104875706439110156251225614941159441477<39> × 1056836588644853738704557482552056406147<40> |