Compare 61 vs 191
| Property | 61 | 191 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 611 | 1911 |
| Prime factorization | 61 | 191 |
| Divisors count | 2 | 2 |
| Divisors | 1, 61 | 1, 191 |
| Number of properties | 12 | 16 |
| Additive primes | 11th | 24th |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Chen primes | 34th | |
| Class 1+ primes | 14th | |
| Cuban primes 1 | 4th | |
| Good primes | 16th | |
| Harmonic primes | 15th | |
| Long primes | 8th | |
| Palindromic primes | 10th | |
| Pierpont primes of the 2nd kind | 14th | |
| Primes | 18th | 43rd |
| Prime quadruplets (1st member) | 4th | |
| Prime triplets (1st member) | 13th | |
| Pythagorean primes | 8th | |
| Sexy primes (1st member) | 12th | 25th |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | 25th |
| Sophie germain primes | 15th | |
| Super primes | 14th | |
| Thabit primes | 6th | |
| Twin primes (1st member) | 14th | |
| Twin primes (2nd member) | 7th | |
| Roman numberals | LXI | CXCI |
| Base 2 | 1111012 | 101111112 |
| Base 3 | 20213 | 210023 |
| Base 4 | 3314 | 23334 |
| Base 5 | 2215 | 12315 |
| Base 6 | 1416 | 5156 |
| Base 7 | 1157 | 3627 |
| Base 8 | 758 | 2778 |
| Base 9 | 679 | 2329 |
| Base 10 | 6110 | 19110 |
| Base 11 | 5611 | 16411 |
| Base 12 | 5112 | 13b12 |
| Base 13 | 4913 | 11913 |
| Base 14 | 4514 | d914 |
| Base 15 | 4115 | cb15 |
| Base 16 | 3d16 | bf16 |