Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 481: | \[{15^{481}-1\over14}\] | 53 × 223 × 4441 × 157483 × 16655159 × 32217011 × 76995218821<11> × 2474070455887<13> × 29645965890637091<17> × [142888386137414646934820456919258103977216659935523679643272018717193502059354684098636496823702825683681078217447849032734066824083102769500538012522665193853965670605949517482872063021592944366074422819781145517677095259253058741352063229714200556549694924200127779132740391654832668234802687579657814771550646066732870892276882911337909201434065779434419633495995250935604980301232594974687397667174526509258277563387485635975082664601951827106644704730251739050230220660048547820573840334753741<498>] |