Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 115: | \[{5^{115}-1\over4}\] | 11 × 71 × 461 × 691 × 8971 × 689081 × 2855911 × 29028071 × 824480311 × 17223586571<11> × 332207361361<12> × 100062970166640331<18> |