Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 530: | \[{20^{530}-1\over19}\] | 3 × 7 × 11 × 61 × 107 × 251 × 1061 × 63601 × 152381 × 593071 × 1607491 × 10016055541<11> × 24540050076369381718561<23> × 165466800617812916508344537440861<33> × 1448809975287465515210887962122581<34> × 5440119997877781080625831492670621<34> × 94160352262970314114261834693337410481<38> × 3257272076316750353139146661697870498891<40> × 77602922321812239576264313929813789252049899747836604096263622491<65> × 400854439463328526924788607031597685803293279928793947485536270583<66> × 138563586930428561309910487879721769346494867390140816952966221229808804484730334125241<87> × 11766314543086935200223054757378426130531193799228464482412821350803197974633428848242946715703788680036468375004075586392784542318396014618610847876542333721236933287159035190647824664007678963059498360668140914604283509747796341<230> |