Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 381: | \[{13^{381}-1\over12}\] | 3 × 61 × 1011937 × 5912867 × 190421635185941<15> × 115806724907473978817<21> × 1889628004829682891131446914841122715904737697796281271846268890798899576955033713387489540044285157<100> × [47207056384403501751352019061921563734980218257762474647171940376315388298138229795446322869854591656081465497281572274657009481087786147592509245955339052859337303112202206288085955735587919864441759897185776197696268948818150845853323169240002979600526532019536129787941817<275>] |