Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{5^{91}-1\over4}\] | 19531 × 305175781 × 9680647790568589086355559<25> × 17499733663152976533452519<26> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[{5^{91}-1\over4}\] | 19531 × 305175781 × 9680647790568589086355559<25> × 17499733663152976533452519<26> |