Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 390: | \[{5^{390}-1\over4}\] | 2 × 32 × 7 × 11 × 31 × 61 × 71 × 79 × 131 × 181 × 521 × 1741 × 3121 × 5227 × 7621 × 14821 × 18461 × 38923 × 305175781 × 933692761 × 15188886343541<14> × 22735632934561<14> × 608459012088799<15> × 1034150930241911<16> × 14011933046202781<17> × 15199221608544481<17> × 20986207825565581<17> × 1755692053873139750161<22> × 13139700116898999203751361<26> × 86047082949427536089202802741<29> × 431114130336966439253639900581<30> |