Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 544: | \[{28^{544}-1\over27}\] | 5 × 172 × 29 × 97 × 137 × 157 × 239 × 613 × 1361 × 2347 × 5441 × 8807 × 33049 × 108529 × 302329 × 614657 × 2012449 × 4338337 × 168542177 × 809119897 × 2057592961 × 22223646961<11> × 45508138747<11> × 148020807352107352204781<24> × 3260819546463131426073217<25> × [425315646451941744520766360190876099715089532300343268884520117131646214963154000054063289294997887354483331191438629825543496408974981262208512986090241326361401459949253253326425198000600418196087987216392764483296884245607537288421918912403709513246406637314262524030145936153519980098212631695611568130651627218274459178053839870647823538117269839276634818036338646653670513510823325284466642982610706198667191677244150783353454978688781214460961228324211460185189364672670483566648777551489485136740900966342435640355117168341985093132914958080604440837928292852005690228900729861790899408500089782065877200025663284353073<627>] |