Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 115: | \[{31^{115}-1\over30}\] | 5 × 11 × 17351 × 1509997 × 61562537 × 176542021 × 524818601 × 7176374761323733117<19> × 1814392827075469009286547723958497289007356519948646784210029597394244012245475287978655917791234899524643597615301<115> |