Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 309: | \[{13^{309}-1\over12}\] | 3 × 61 × 5563 × 9577825183<10> × 6619696803001<13> × 299872566772439874463<21> × 427382931571221401473<21> × 1493185475735966076741431<25> × 1687923550776185387613866347339237<34> × 19026442010188172700578868793469892827183847475034770559<56> × [33952475210995860067680438045771511569838682647415672258976072594117706597704005016224087972210568088543977127508135245902743846924146614358484324794603207970029<161>] |