Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
109: | \[{31^{109}-1\over30}\] | 51449 × 2343831762403621871151256741541135747077038710128331384496404295043318357374905161814141969295888166888750191117722611881628687589524728338038044684969729161<157> |