Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 531: | \[{3^{531}-1\over2}\] | 13 × 709 × 757 × 3030949 × 14425532687<11> × 318413423593<12> × 52482008124253<14> × 489769993189671059<18> × 2224898159852613649<19> × 9736622508037946817946068730077829<34> × 179197588057109824392880988379522349<36> × 1158552423663719046477234701625516500887171129720169368774686662699924022608531835818729423195387461<100> |