Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 209: | \[{28^{209}-1\over27}\] | 419 × 60611 × 6077039 × 21084187 × 50545507 × 5504044949138999959<19> × 11691921803678955385540384142557677518869273030137458638062733600245048686691107425373823176122666959336597090058506020882794926475042136858114545369739561383365741797846118616165250742859632407873323959196496976658402412866377244430569205596066098170461<254> |