tables > repunit > 21

Base 21 Repunits

Table

Viewing: 815 – 815 << prev next >>

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Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>

* 815: \[{21^{815}-1\over20}\] 5 × 13693 × 40841 × 66200821 × 14599604213<11> × 17132062841<11> × 561788105646941<15> × 71382227518918280601812453<26> × 233873265768022293940710651427<30> × 375293848786689453728783544296310281471843370384860719701298799<63> × 23624394860436672961074440125549492456615261234980975872188679386843<68> × [52752222388714950450413537367164680717304499986077448050690342818043496902229849548767534654564398424704136815022608519176436079082091682230088975069249904198567264178590748146705582499803183427202459638498655566728392813484437644691668844521905455034113983864045209954413683664352870863195992148454527384389233834053291922834946692197786539034018549252075128267604703501073164167269445830931590653493082640553124221071797044622480173395886713632845308593590702852402730548065829721012732313187122616034539466783018142180276378932934244031643410201355676852326130473820266696675686029730069953644904645680178989508524606207987692203628087564410409378912238357867948974679119411456283338347672228646590895798617696884113094458151601487182361293965060348799916643027957800042774204820320676066603058570883642986625131235164857246757814322421<839>]

Index range: 815 – 815 << prev next >>