Compare 305 vs 307
| Property | 305 | 307 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 611 | 3071 |
| Prime factorization | 5 × 61 | 307 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 61, 305 | 1, 307 |
| Number of properties | 1 | 9 |
| Chen primes | 47th | |
| Cousin primes (1st member) | 18th | |
| Good primes | 22nd | |
| Harmonic primes | 25th | |
| Isolated primes | 26th | |
| Lucky primes | 18th | |
| Primes | 63rd | |
| Prime triplets (1st member) | 18th | |
| Semiprimes | 98th | |
| Sexy primes (1st member) | 35th | |
| Roman numberals | CCCV | CCCVII |
| Base 2 | 1001100012 | 1001100112 |
| Base 3 | 1020223 | 1021013 |
| Base 4 | 103014 | 103034 |
| Base 5 | 22105 | 22125 |
| Base 6 | 12256 | 12316 |
| Base 7 | 6147 | 6167 |
| Base 8 | 4618 | 4638 |
| Base 9 | 3689 | 3719 |
| Base 10 | 30510 | 30710 |
| Base 11 | 25811 | 25a11 |
| Base 12 | 21512 | 21712 |
| Base 13 | 1a613 | 1a813 |
| Base 14 | 17b14 | 17d14 |
| Base 15 | 15515 | 15715 |
| Base 16 | 13116 | 13316 |