Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 529: | \[{4^{529}-1\over3}\] | 47 × 17987 × 178481 × 2796203 × 6190092443<10> × 8633301049969<13> × 54999142147740840245669969<26> × 347916608026315949237260151<27> × 9114901722266383629807574332217258944092868367<46> × 1201143211548122610156499073546827568174014812959988601<55> × 217944041130072761434232636086171275808213824080756057911187217466035964889017776335440161826412163135274630074790424908997633<126> |