Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 124: | \[{13^{124}-1\over12}\] | 22 × 5 × 7 × 17 × 311 × 373 × 1117 × 1861 × 2729 × 1178621 × 48534593 × 145831193 × 16389023943543602257<20> × 111109852618983753193<21> × 8170509011431363408568150369<28> × 576918426137514613314253213249<30> |