Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
131: | \[{11^{131}-1\over10}\] | 263 × 7791763956749016154215607697892626144401<40> × 1290774032138704646634687668236941308305597514202044201343330196757304660698533426132941183587<94> |