Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 840: | \[{28^{840}-1\over27}\] | 3 × 52 × 11 × 13 × 29 × 31 × 41 × 43 × 61 × 71 × 113 × 157 × 211 × 271 × 281 × 337 × 421 × 449 × 601 × 631 × 757 × 1051 × 1861 × 2269 × 2521 × 3361 × 4621 × 7321 × 13007 × 14561 × 15991 × 23633 × 29201 × 29443 × 35771 × 41641 × 45541 × 47221 × 53951 × 59221 × 84961 × 93913 × 132679 × 206501 × 236881 × 614657 × 637421 × 734941 × 749729 × 924841 × 2449561 × 4422461 × 6313861 × 23803361 × 25917641 × 51605161 × 52000411 × 54034289 × 57464401 × 84673681 × 213827041 × 688406401 × 856213121 × 1100860153 × 7257822361<10> × 14961516151<11> × 31384274881<11> × 317689739221<12> × 439840060577<12> × 2863024493281<13> × 15463990974881<14> × 24155172245401<14> × 40860961267393<14> × 105632155735261<15> × 1043370300810769<16> × 2005875869991701<16> × 14070581691669049<17> × 223934956756993189<18> × 3003033748840445350801<22> × 102324803053934305339531<24> × 148193546048624098783489<24> × 488349141962958580399201<24> × 16604279565503032045034113<26> × 99885743242098024883367081<26> × [21626941569442371098057583283512050476198411071598167797036355090147533988210787584900645892928948673922780519687565282238196604162194012250035612498487921914425693817674010707229173597675963402596407441418567700292662561173393016562163507576110775100020114483497481404431278513026092322339723967250304906525332939759665040890162500496213834853508308757352597175537664561389217728718073980507684939626257814662714043536336974750571954581000666870607868610149215199680149858958551753451285098290421741847525379354570030725041767269668834495134813459643182613667695243852351807713424734189127115036541880621<605>] |