Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 196: | \[{28^{196}-1\over27}\] | 5 × 29 × 113 × 157 × 197 × 281 × 13007 × 28813 × 35771 × 51647 × 57527 × 749729 × 2155609 × 4422461 × 248397367 × 1100860153 × 1249329089 × 319343666713<12> × 5966523512629<13> × 47562389635488030795003583<26> × 44498235948084746667439513476081194102813<41> × 29147263066257579499259392814360116308845617443386948553122089928284541233457729330601249810923511978390494957633<113> |