Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 291: | \[{13^{291}-1\over12}\] | 3 × 61 × 389 × 971 × 10477 × 329520253 × 93964390627<11> × 179602500680615671<18> × 29520729391808673332666926129<29> × 2649670037989481306648479727588559059666394088223938940478532104361128850279248331066898797<91> × 380190042833448440170693700875743962791357565465182460562840221707360350742932119757140496645963400538522502678715893132275048342009179332270748218368801839<156> |