Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 203: | \[{15^{203}-1\over14}\] | 7 × 59 × 1743463 × 2347493 × 221864077710117666600174298853<30> × 15476275967141572773889537007699<32> × 686557639226952509491990560619745745613283502603563978218051581450519720419466576330340133389873680160660384063585193683510376619794093051760793732959891030042409<162> |