Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 231: | \[{28^{231}-1\over27}\] | 3 × 113 × 199 × 271 × 6469 × 8317 × 36037 × 290137 × 4422461 × 6077039 × 50545507 × 177222314809<12> × 15215787226333<14> × 223934956756993189<18> × 106807694243182385377<21> × 8043246179584357573185817<25> × 425141076149786955572181811<27> × 5320614889323243834845114570091316426473321807889<49> × 44408049754770052555829804636745605806137044150609856225089539842742901163944046187525903492039723027585551425645513804603881<125> |