Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 407: | \[{31^{407}-1\over30}\] | 23 × 149 × 397 × 617 × 4219 × 150332843 × 86615407891<11> × 152597832677<12> × 257803457371<12> × 386626708057<12> × 52812493022953<14> × [8677091683714545019229305166328695225082334597049222473920763227162817423453246785031793729658038948478011179535745840113955806710830591481528779187767993033202552943846738019848210525994889619946320713749692632938116124444781748123830012655252461896483050061093559627750971414897000878677080321256767285064546426001312869762526851785384766929823608079873080031058263135726937478980528978025123470171417748625196891410994314034446069919996280468534638532859745799545802499991934507989330015603201443783027795612440731351219611<526>] |