Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 371: | \[{20^{371}-1\over19}\] | 29 × 71 × 2969 × 32719 × 593071 × 21009731 × 13669906069<11> × 15447674999<11> × 72386928201367319<17> × 24540050076369381718561<23> × 3257272076316750353139146661697870498891<40> × [8313095347698229835896003235306823714817969447157559254407965277215057744624860871183040216813330935005055287050669348937506169079591122043286241553114832233813778273248696468159975346380746294740406978437658925077849124886554629094620609121787071307852861624651110371841283437832256276989023542115049237557644095968205088112982547414268397068269815490678011<358>] |