Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[{28^{180}-1\over27}\] | 32 × 52 × 11 × 13 × 192 × 29 × 31 × 37 × 61 × 127 × 157 × 181 × 271 × 757 × 1801 × 1861 × 3061 × 3511 × 4621 × 12781 × 14561 × 15991 × 24481 × 45541 × 47221 × 50221 × 53951 × 84961 × 102547 × 444979 × 637421 × 691651 × 734941 × 2449561 × 7302331 × 48403441 × 84673681 × 188878213 × 688406401 × 551640495331<12> × 1114029602365666612314868561<28> × 1257019733614904150336558897946087643548174624248023090029790321<64> |