Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 88: | \[{31^{88}-1\over30}\] | 27 × 13 × 23 × 37 × 89 × 397 × 409 × 617 × 1129 × 2729 × 757241 × 150332843 × 1048563011 × 414407390867564627396249<24> × 245911396799577828131028569<27> × 12236290645201501169749559350025041<35> |