Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
46: | \[{31^{46}-1\over30}\] | 25 × 47 × 1509997 × 61562537 × 45414448613<11> × 7176374761323733117<19> × 293006379555093281221<21> |