Compare 1929 vs 1931
| Property | 1929 | 1931 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 6431 | 19311 |
| Prime factorization | 3 × 643 | 1931 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 643, 1929 | 1, 1931 |
| Number of properties | 1 | 5 |
| Chen primes | 182nd | |
| Harmonic primes | 108th | |
| Primes | 294th | |
| Semiprimes | 555th | |
| Sophie germain primes | 59th | |
| Twin primes (1st member) | 59th | |
| Roman numberals | MCMXXIX | MCMXXXI |
| Base 2 | 111100010012 | 111100010112 |
| Base 3 | 21221103 | 21221123 |
| Base 4 | 1320214 | 1320234 |
| Base 5 | 302045 | 302115 |
| Base 6 | 125336 | 125356 |
| Base 7 | 54247 | 54267 |
| Base 8 | 36118 | 36138 |
| Base 9 | 25739 | 25759 |
| Base 10 | 192910 | 193110 |
| Base 11 | 14a411 | 14a611 |
| Base 12 | 114912 | 114b12 |
| Base 13 | b5513 | b5713 |
| Base 14 | 9bb14 | 9bd14 |
| Base 15 | 88915 | 88b15 |
| Base 16 | 78916 | 78b16 |