Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 208: | \[{5^{208}-1\over4}\] | 24 × 3 × 132 × 17 × 53 × 313 × 5227 × 11489 × 38923 × 51169 × 247161617 × 305175781 × 825256433 × 2220784177 × 537181587281<12> × 31308249137777<14> × 83181652304609<14> × 129044008326199409<18> × 889988147002015336570560929<27> |