Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 294: | \[{28^{294}-1\over27}\] | 3 × 29 × 43 × 113 × 197 × 271 × 631 × 757 × 1471 × 2269 × 4999 × 13007 × 28813 × 29443 × 35771 × 51647 × 57527 × 132679 × 201979 × 1090153 × 2155609 × 4422461 × 155137039 × 248397367 × 571843231 × 319343666713<12> × 2607528735841<13> × 5966523512629<13> × 223934956756993189<18> × 47562389635488030795003583<26> × 17733447184020195312619959151<29> × 991322283651723729605072437657<30> × 16651838915665484336259585989031118393<38> × 44498235948084746667439513476081194102813<41> × 2023532149466799320418430885960268664095518986313<49> × 5976650414468625923743778041728709058600594828694901<52> |