Compare 1861 vs 2011
| Property | 1861 | 2011 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18611 | 20111 |
| Prime factorization | 1861 | 2011 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1861 | 1, 2011 |
| Number of properties | 10 | 4 |
| Centered square primes | 15th | |
| Good primes | 58th | |
| Harmonic primes | 103rd | 113th |
| Isolated primes | 173rd | 184th |
| Long primes | 112th | |
| Primes | 284th | 305th |
| Pythagorean primes | 137th | |
| Sexy primes (1st member) | 120th | 130th |
| Sexy prime quadrupletss (1st member) | 12th | |
| Sexy prime triplets (1st member) | 47th | |
| Roman numberals | MDCCCLXI | MMXI |
| Base 2 | 111010001012 | 111110110112 |
| Base 3 | 21122213 | 22021113 |
| Base 4 | 1310114 | 1331234 |
| Base 5 | 244215 | 310215 |
| Base 6 | 123416 | 131516 |
| Base 7 | 52667 | 56027 |
| Base 8 | 35058 | 37338 |
| Base 9 | 24879 | 26749 |
| Base 10 | 186110 | 201110 |
| Base 11 | 144211 | 156911 |
| Base 12 | 10b112 | 11b712 |
| Base 13 | b0213 | bb913 |
| Base 14 | 96d14 | a3914 |
| Base 15 | 84115 | 8e115 |
| Base 16 | 74516 | 7db16 |