Compare 2991 vs 2999
| Property | 2991 | 2999 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 9971 | 29991 |
| Prime factorization | 3 × 997 | 2999 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 997, 2991 | 1, 2999 |
| Number of properties | 1 | 6 |
| Additive primes | 222nd | |
| Chen primes | 257th | |
| Good primes | 80th | |
| Primes | 430th | |
| Safe primes | 50th | |
| Semiprimes | 838th | |
| Twin primes (1st member) | 82nd | |
| Roman numberals | MMCMXCI | MMCMXCIX |
| Base 2 | 1011101011112 | 1011101101112 |
| Base 3 | 110022103 | 110100023 |
| Base 4 | 2322334 | 2323134 |
| Base 5 | 434315 | 434445 |
| Base 6 | 215036 | 215156 |
| Base 7 | 115027 | 115137 |
| Base 8 | 56578 | 56678 |
| Base 9 | 40839 | 41029 |
| Base 10 | 299110 | 299910 |
| Base 11 | 227a11 | 228711 |
| Base 12 | 189312 | 189b12 |
| Base 13 | 149113 | 149913 |
| Base 14 | 113914 | 114314 |
| Base 15 | d4615 | d4e15 |
| Base 16 | baf16 | bb716 |