Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 254: | \[{13^{254}-1\over12}\] | 2 × 7 × 5912867 × 190421635185941<15> × 115806724907473978817<21> × 687304059153048444682671733000360314795590589587024964570201596437<66> × 307276111615988386477617591133327473037536679011914070596658374566605942001<75> × 1889628004829682891131446914841122715904737697796281271846268890798899576955033713387489540044285157<100> |