Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 155: | \[{13^{155}-1\over12}\] | 311 × 1117 × 30941 × 100860853831<12> × 46458503064581<14> × 100889415553845820735921<24> × 8170509011431363408568150369<28> × 92004248303020993526196675121322092347425884048347942211823998841588752301090095079051<86> |