tables > repunit > 21

Base 21 Repunits

Table

Viewing: 257 – 257 << prev next >>

(available: 0-999)

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

* 257: 21257−120 816907714221776954808949<24> × [395508438299961331714853927525280405888700833474694215844563307687510381666455546364443485900829769022069747509842511680294081480266223733376948090851052158987672143058069936295769787003688063367096399456696449989614212187461671056964108015710549443186904639442557532596053314470484135770795563720568683501135486173<315>]

Index range: 257 – 257 << prev next >>