Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
72: | \[{5^{72}-1\over4}\] | 23 × 33 × 7 × 13 × 19 × 31 × 37 × 73 × 313 × 601 × 829 × 5167 × 390001 × 543097 × 6597973 × 1503418321 |