Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 243: | \[{31^{243}-1\over30}\] | 35 × 331 × 487 × 2593 × 3637 × 4861 × 13933 × 81343 × 477739 × 6757669 × 7822981 × 1836205027201<13> × 126901881805771<15> × 124796720050174992115146031610052568212932455637390989<54> × [5613304015221238650989345408115169728199318104788328263418799435277990188026503844048989438839623445778627214798080979832017525905151665131264562400309274027855973361149028689492646639508598330741145391379121436835105218497540859640833<235>] |