Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 340: | \[{28^{340}-1\over27}\] | 52 × 11 × 29 × 61 × 137 × 157 × 239 × 613 × 1021 × 2347 × 5101 × 8807 × 14561 × 33049 × 53951 × 84961 × 637421 × 887401 × 412716481 × 45508138747<11> × 444007193911<12> × 2956126339800478546451<22> × 148020807352107352204781<24> × 12384607251106312764457801<26> × 4493911532793397608107303677360753164689<40> × 327522355999708029837673614332668313711853849944379030509801<60> × 451024205517517423233774595442089125772950234281803785388700007290734071220905548590621<87> × 6479872935731171798864849748309892039360614002183014375133375812562443154654445341469480730223855711900619885695521707041331675341815152540107281<145> |