Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 195: | \[{5^{195}-1\over4}\] | 11 × 31 × 71 × 79 × 131 × 181 × 1741 × 14821 × 305175781 × 933692761 × 608459012088799<15> × 1034150930241911<16> × 20986207825565581<17> × 13139700116898999203751361<26> × 86047082949427536089202802741<29> |