Compare 503 vs 515
| Property | 503 | 515 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 5031 | 51 × 1031 |
| Prime factorization | 503 | 5 × 103 |
| Divisors count | 2 | 4 |
| Divisors | 1, 503 | 1, 5, 103, 515 |
| Number of properties | 9 | 1 |
| Chen primes | 68th | |
| Cousin primes (2nd member) | 27th | |
| Harmonic primes | 40th | |
| Isolated primes | 49th | |
| Long primes | 36th | |
| Primes | 96th | |
| Safe primes | 18th | |
| Semiprimes | 159th | |
| Sexy primes (1st member) | 47th | |
| Solinas primes | 37th | |
| Roman numberals | DIII | DXV |
| Base 2 | 1111101112 | 10000000112 |
| Base 3 | 2001223 | 2010023 |
| Base 4 | 133134 | 200034 |
| Base 5 | 40035 | 40305 |
| Base 6 | 21556 | 22156 |
| Base 7 | 13167 | 13347 |
| Base 8 | 7678 | 10038 |
| Base 9 | 6189 | 6329 |
| Base 10 | 50310 | 51510 |
| Base 11 | 41811 | 42911 |
| Base 12 | 35b12 | 36b12 |
| Base 13 | 2c913 | 30813 |
| Base 14 | 27d14 | 28b14 |
| Base 15 | 23815 | 24515 |
| Base 16 | 1f716 | 20316 |