tables > repunit > 21

Base 21 Repunits

Table

Viewing: 457 – 457 << prev next >>

(available: 0-999)

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

* 457: \[{21^{457}-1\over20}\] 312589 × 6617715547<10> × 5930991840494001901<19> × [73177671186682373933716904919020956593470337088970206451161147423167322026315816511162297042795537037759906590368213872031241686994624244487511882488740565143471181729038080964111756423309961947040963863764982966989517800080051558967916006870043134765025680290414226226997333000838158760857301464324613555282483597597670797234830758337658322172263250363445353380680399367100468683350667479380626944527903645893346674921579946628760776114533401675751688899571854363423967443974671608545114716871849961262127556737072657274186166789365973647209656446738733246137952161219<569>]

Index range: 457 – 457 << prev next >>