Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 173: | \[{31^{173}-1\over30}\] | 347 × 173347 × 206838109 × 933943287947919218437631265408294267089<39> × 4715629387612348923989826887818357622351414398501577104569705380591857454726814801383419<88> × 616190849029731601728694079361176447710721788558821559208863922151197156632674626189773361733406233598394516650703<114> |