Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 249: | \[{31^{249}-1\over30}\] | 3 × 167 × 331 × 499 × 1993 × 182933 × 40003511 × 74824336159<11> × 51593443404264110239768071673<29> × 85912184821599706072006943100214874792000179599875431278393402841<65> × 18603070387736772840365790229020102724607599006385237470946482731701962164875225855309906830278957727704083147446808936021271607138338895759445178202454021326359687251960428967947486705100694991112135141245288404596668640812808319114680389177<242> |