Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
167: | \[{20^{167}-1\over19}\] | 287428711 × 37928589651593967631<20> × 8729155618943400958962868125720610879<37> × 339928948023704992112365803592763627159879<42> × 30436761934039128153629707111840952723961898835615665440263005554508581065061132176624673520580935179155442341<110> |