Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 228: | \[{5^{228}-1\over4}\] | 22 × 32 × 7 × 13 × 31 × 191 × 229 × 601 × 761 × 6271 × 19609 × 22573 × 213029 × 3981071 × 53590717 × 4885168129<10> × 2108505761893<13> × 2864226125209369<16> × 75649382555448580095589<23> × 11735415506748076408140121<26> × 86336058161143199543775877<26> |