Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 253: | \[{15^{253}-1\over14}\] | 67 × 463 × 829 × 2333 × 8537 × 31741 × 2136839 × 3325963807 × 16696423811<11> × 3046462151831565769<19> × 6111428874683096933<19> × [7073888769072029864301020286842234903525429715303106499874445123158335927729555385330297929531665949504787840654656350401770590047752645307218310441359615975371935645072935535378956938825396108010574672162943047239<214>] |