Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 400: | \[{28^{400}-1\over27}\] | 53 × 11 × 17 × 29 × 41 × 61 × 101 × 151 × 157 × 241 × 401 × 14561 × 15101 × 15601 × 29201 × 41641 × 53951 × 54001 × 84961 × 106801 × 614657 × 637421 × 1810001 × 2606251 × 67643801 × 6813064001<10> × 7984305701<10> × 22223646961<11> × 24946065401<11> × 192184659301<12> × 1515138072601<13> × 2863024493281<13> × 360728480233546501<18> × 3250144890260318201<19> × 4411542432420060881<19> × 222929435014083414901<21> × 1228279101647209944401<22> × 54979382922948140609798201<26> × 39279431263137951958903017306541011592253291986497113914201<59> × 64995488544481647406365290031495753469967428582731603965556796014940175272300514632042649812845247994088856190406798636384549647107520267437608824068230785718582529623154249049620508085566027283104761446550117600935620166147601<227> |