Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 260: | \[{13^{260}-1\over12}\] | 22 × 52 × 7 × 11 × 17 × 53 × 131 × 421 × 521 × 601 × 641 × 1171 × 2411 × 13417 × 16381 × 20333 × 30941 × 79301 × 156131 × 264031 × 380329 × 1803647 × 5218721 × 6691361 × 3808876542352598861<19> × 71442881968439190301<20> × 1418792215861230619657<22> × 158943831041162255277151<24> × 5085423411603888410443263272201<31> × 72395677076468070119906108281513841<35> × 66297192931970414432967232640233551304622837126889259081<56> |