Base 29 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
57: | \[{29^{57}-1\over28}\] | 13 × 67 × 571 × 11971 × 73303 × 1386659 × 274773085966123<15> × 157193380600163813309<21> × 310629920727179958380414509<27> |