Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 399: | \[{5^{399}-1\over4}\] | 31 × 191 × 379 × 6271 × 9311 × 19531 × 65171 × 281429 × 519499 × 3981071 × 93174481 × 3257947519 × 152317058321<12> × 11735415506748076408140121<26> × 29090007107767075239783794592001366542871<41> × 126368863713770481047657519976032221963728146785045672287466498889949586726611946329514911779372482581842421351214666490207902222356573808012801<144> |