Base 29 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{29^{68}-1\over28}\] | 22 × 3 × 5 × 421 × 1973 × 3911 × 354553 × 1977917 × 3877667 × 31618925959007<14> × 33505187587603<14> × 176416285087852792172419157313795755429257<42> |