Compare 311 vs 491
| Property | 311 | 491 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3111 | 4911 |
| Prime factorization | 311 | 491 |
| Divisors count | 2 | 2 |
| Divisors | 1, 311 | 1, 491 |
| Number of properties | 13 | 7 |
| Additive primes | 36th | |
| Chen primes | 48th | 66th |
| Cousin primes (2nd member) | 18th | 26th |
| Emirps | 16th | |
| Good primes | 23rd | |
| Harmonic primes | 26th | 38th |
| Isolated primes | 47th | |
| Long primes | 34th | |
| Multiplicative primes | 13th | |
| Primes | 64th | 94th |
| Prime triplets (1st member) | 19th | |
| Prime triplets (2nd member) | 18th | |
| Right-truncatable primes | 17th | |
| Sexy primes (1st member) | 36th | |
| Sophie germain primes | 25th | |
| Twin primes (1st member) | 20th | |
| Roman numberals | CCCXI | CDXCI |
| Base 2 | 1001101112 | 1111010112 |
| Base 3 | 1021123 | 2000123 |
| Base 4 | 103134 | 132234 |
| Base 5 | 22215 | 34315 |
| Base 6 | 12356 | 21356 |
| Base 7 | 6237 | 13017 |
| Base 8 | 4678 | 7538 |
| Base 9 | 3759 | 6059 |
| Base 10 | 31110 | 49110 |
| Base 11 | 26311 | 40711 |
| Base 12 | 21b12 | 34b12 |
| Base 13 | 1ac13 | 2ba13 |
| Base 14 | 18314 | 27114 |
| Base 15 | 15b15 | 22b15 |
| Base 16 | 13716 | 1eb16 |