Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
90: | \[{5^{90}-1\over4}\] | 2 × 33 × 7 × 11 × 19 × 31 × 61 × 71 × 181 × 521 × 829 × 1171 × 1741 × 5167 × 7621 × 169831 × 297315901 × 60081451169922001<17> |