Compare 149 vs 251
| Property | 149 | 251 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1491 | 2511 |
| Prime factorization | 149 | 251 |
| Divisors count | 2 | 2 |
| Divisors | 1, 149 | 1, 251 |
| Number of properties | 8 | 10 |
| Chen primes | 29th | 41st |
| Emirps | 11th | |
| Good primes | 14th | 19th |
| Harmonic primes | 12th | 20th |
| Isolated primes | 21st | |
| Long primes | 13th | |
| Primes | 35th | 54th |
| Pythagorean primes | 16th | |
| Sexy primes (1st member) | 30th | |
| Sexy prime quadrupletss (1st member) | 5th | |
| Sexy prime triplets (1st member) | 15th | |
| Solinas primes | 30th | |
| Sophie germain primes | 18th | |
| Twin primes (1st member) | 12th | |
| Roman numberals | CXLIX | CCLI |
| Base 2 | 100101012 | 111110112 |
| Base 3 | 121123 | 1000223 |
| Base 4 | 21114 | 33234 |
| Base 5 | 10445 | 20015 |
| Base 6 | 4056 | 10556 |
| Base 7 | 3027 | 5067 |
| Base 8 | 2258 | 3738 |
| Base 9 | 1759 | 3089 |
| Base 10 | 14910 | 25110 |
| Base 11 | 12611 | 20911 |
| Base 12 | 10512 | 18b12 |
| Base 13 | b613 | 16413 |
| Base 14 | a914 | 13d14 |
| Base 15 | 9e15 | 11b15 |
| Base 16 | 9516 | fb16 |