Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 321: | \[{15^{321}-1\over14}\] | 241 × 643 × 1499 × 6421 × 194527 × 609913483 × 17221279121951<14> × 8296079506365811612150733<25> × 8238863910860240211186514584551<31> × 368612716550576240747224386242176921<36> × [311824134382290915937828460201321232169390379921894150005359502433314572945610526302003176254117310573306418327499407476271669482711063446337882424612139607252826302488297228381274803146984654331831950271546959233778095182242155909135604965178141<246>] |