Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 190: | \[{5^{190}-1\over4}\] | 2 × 3 × 11 × 71 × 191 × 521 × 761 × 2851 × 4561 × 6271 × 19609 × 213029 × 3981071 × 4113691 × 1245576402371959291<19> × 11600321878916922053491<23> × 179763436784239734042181<24> × 309828362361188845069741<24> |