tables > repunit > 21

Base 21 Repunits

Table

Viewing: 489 – 489 << prev next >>

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

* 489: \[{21^{489}-1\over20}\] 463 × 13693 × 34231 × 14599604213<11> × 561788105646941<15> × 102853981862404201249<21> × 71382227518918280601812453<26> × 233873265768022293940710651427<30> × 375293848786689453728783544296310281471843370384860719701298799<63> × 23624394860436672961074440125549492456615261234980975872188679386843<68> × [67806042298616227313103680696600947869626753729286760415667515436689461332435331481117329209106233418802344692620269752728078779316043900470185119988009855949579816826992410746118326728533570336827464579790146812522297529837895691797948943205067963317914584176652567523474187951790083236854205862046364724334785598948667426468245340602275496267136270083500236256719899854656005232874627924594941884680239<404>]

Index range: 489 – 489 << prev next >>