tables > repunit > 21

Base 21 Repunits

Table

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

* 538: \[{21^{538}-1\over20}\] 2 × 11 × 3229 × 5074663481<10> × 1257086300416475187195389<25> × 585500336786185958636423956394934972525391891372508132781128058693803801702718372074174223182883419352274433576091451465607195703299903633364190033148451636454189619587515209426892032349408152838323024151011825915342875463956707858185827127031022563263866459267363822124065475460112325985294799503593833643895925175824853886269<327> × [425755585971543215813278913059379959979750325667692391050541871668147534943537255849073046520962609365035120248205723009790656178436416229822157749921121447757871503611868962462354329559015635851141343301251016246598042124883010594498418276331384285040283588687581618087306526105650759400160599622358316722187290333899441771897064996496836145601<345>]

Index range: 538 – 538 << prev next >>