Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 292: | \[{20^{292}-1\over19}\] | 3 × 7 × 293 × 401 × 877 × 30223 × 80447 × 92419 × 8140523 × 2991402761 × 6412324721641<13> × 5080516670789273543<19> × 14951607434498798145554889626044947483088978695769<50> × 2414706072319339663234728418921779406520973297127462569161<58> × 8388017164299528473137529640945135276336333707655875659563939090886233451999<76> × 35851184277711856679655025572749346135106054103376428627260859891944782118827561927589834543784601085581241904089092039098281<125> |