Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 265: | \[{20^{265}-1\over19}\] | 11 × 61 × 251 × 593071 × 1607491 × 10016055541<11> × 24540050076369381718561<23> × 165466800617812916508344537440861<33> × 1448809975287465515210887962122581<34> × 94160352262970314114261834693337410481<38> × 3257272076316750353139146661697870498891<40> × 77602922321812239576264313929813789252049899747836604096263622491<65> × 138563586930428561309910487879721769346494867390140816952966221229808804484730334125241<87> |