Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 498: | \[{28^{498}-1\over27}\] | 3 × 29 × 167 × 271 × 499 × 757 × 39841 × 21661517621<11> × 54719250172702697<17> × 1028253520282367653<19> × 1305184467040286965673<22> × 756879937146417784242493039<27> × 65642602122533083476691308195970252142124523<44> × 5091332573154034332808866141011655364692094123998293376413<58> × 627923257871242036981504398830612987919668142351258398920486524603847407069077797<81> × [2748626085540420865511509195708518563002739314355208434148085308554022542746814757011843080669212472172216155461584342473765124888952624942826874360660719952741348485300028268411891960743997313149694858426564651<211>] × 4354482732039751616005203050380392966627533996209503198725474746258421721234752712204354133227136041901383112834973691351444528201841490221663651256510666138708127647039424483380566569101267050518848166073896326226307<217> |