Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 44: | \[{31^{44}-1\over30}\] | 26 × 13 × 23 × 37 × 397 × 617 × 2729 × 757241 × 150332843 × 1048563011 × 245911396799577828131028569<27> |