Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 414: | \[{28^{414}-1\over27}\] | 32 × 192 × 29 × 37 × 47 × 127 × 139 × 271 × 277 × 757 × 7039 × 102547 × 444979 × 1255663 × 46252081 × 94369507 × 115152031 × 92276474077<11> × 140668620541<12> × 255595103341<12> × 4099849287367<13> × 5445810764743861<16> × 224727078564911869<18> × 12804209632826426107<20> × 3421102302281649284721873631<28> × 1517655145813456319033978812579<31> × 28858807508537031604503118350965826038053<41> × 527264972197836529557199851838274216840527<42> × 1925078388410563740723018059030405962910674239939823341742747378400676230238593717890542613330824987685099843255127224364411624053836828259<139> × [4556119488651055089358386224525230840701948597464910215745789344321818717990486695687853121092040090456434723985518373843260522211440962894662495806768232017<157>] |