Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 273: | \[{28^{273}-1\over27}\] | 3 × 53 × 113 × 271 × 1483 × 1951 × 8737 × 4422461 × 219386077 × 4543753614603737<16> × 223934956756993189<18> × 81923931656777716741<20> × 102911923787961640264660021<27> × 151211210289786851561817502989696437469675204045434254843665511834290768780315660400582842258304186236901<105> × 28359786932877280323470938508337255185963267700819493513631626813177523343896961373264672708166817764968571777122399201900794085797286782520097121686043467154707740010830788481273<179> |