Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 455: | \[{31^{455}-1\over30}\] | 5 × 11 × 911 × 1951 × 2549 × 17351 × 42407 × 319061 × 1661479 × 2426789 × 7908811 × 203633641 × 917087137 × 6041004971<10> × 31035996941<11> × 473516688426601<15> × 5979236519649901<16> × 9240957640390889951861<22> × 1122399563430440797573237387545143<34> × 1129363636895809892086303692627113871721<40> × 102672478567468007638784142574112507144367962863477<51> × [556287184665263805069919324516775055813395865879922175059104557151645069167985932356092371245451792547652904645854454666681035814838321391027335178098674805106469723006312190061094011832008858057780940543411639042102213504165205452240572016963773502898122283054742804543314978564106507333305911280592194314895624452585158523818197275568500164180212297191075011903047840776750806364261545769828103465334855841024120430851<420>] |