Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 188: | \[{7^{188}-1\over6}\] | 24 × 52 × 95881 × 4574857237<10> × 13722816749522711<17> × 63681511996418550459487<23> × 655417289594537954307682339857743931943<39> × 1253532666852256127517567034826689596901893081633369129679304101<64> |