Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 476: | \[{31^{476}-1\over30}\] | 26 × 13 × 29 × 37 × 103 × 239 × 2857 × 5237 × 7253 × 11971 × 13469 × 71821 × 78541 × 1399577 × 277739477 × 917087137 × 11781795397<11> × 224499664484159761<18> × 2744226674742050863<19> × 6841661642646463343047<22> × 751670559138758105956097<24> × 1682325489672499143634073<25> × 188793462783207959556320467022417769811681<42> × 25054888960315370919732899676915746704916004311890453878880886612471249251<74> × 2673484072905963425279403748575522050981477588674951678807839850232010414888693188340174590038855339084744897113622927968567994850387<133> × [4195795633380276109798093074532087301793712918413669501113766092845674426583909780387950404151861934331422977315445154844362677823890111880510439077021289266842281367259217309559785453754853254219775938441922085412498132946454571667296500831655957314922890899151386270006542120910813<283>] |