Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 249: | \[{10^{249}-1\over9}\] | 3 × 37 × 4483 × 3367147378267<13> × 1413141919363039<16> × 9512538508624154373682136329<28> × 346895716385857804544741137394505425384477<42> × 79631228080621938573499710253940180960724841<44> × 3524445389714777887659796421466286321350017806951<49> × 50669696582521096493425697065918805986271011284126373<53> |