All Functions and Procedures
| Name | Unit | Description |
|---|---|---|
| primesieve_count_primes | primesieve | Count the primes within the interval [start, stop]. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. Note that each call to primesieve_count_primes incurs an initialization overhead of O(sqrt(stop)) even if the interval [start, stop] is tiny. Hence if you have written an algorithm that makes many calls to primesieve_count_primes it may be preferable to use a primesieve_iterator which needs to be initialized only once. |
| primesieve_count_quadruplets | primesieve | Count the prime quadruplets within the interval [start, stop]. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. |
| primesieve_count_quintuplets | primesieve | Count the prime quintuplets within the interval [start, stop]. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. |
| primesieve_count_sextuplets | primesieve | Count the prime sextuplets within the interval [start, stop]. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. |
| primesieve_count_triplets | primesieve | Count the prime triplets within the interval [start, stop]. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. |
| primesieve_count_twins | primesieve | Count the twin primes within the interval [start, stop]. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. |
| primesieve_free | primesieve | Deallocate a primes array created using the primesieve_generate_primes or primesieve_generate_n_primes functions. |
| primesieve_free_iterator | primesieve | Free all iterator memory. |
| primesieve_generate_n_primes | primesieve | Get an array with the first n primes >= start. |
| primesieve_generate_primes | primesieve | Get an array with the primes inside the interval [start, stop].
|
| primesieve_get_max_stop | primesieve | Returns the largest valid stop number for primesieve. 2ˆ64-1 (UINT64_MAX) |
| primesieve_get_num_threads | primesieve | Get the current set number of threads. |
| primesieve_get_sieve_size | primesieve | Get the current set sieve size in KiB. |
| primesieve_init | primesieve | Initialize the primesieve iterator before first using it. |
| primesieve_next_prime | primesieve | Get the next prime. Returns UINT64_MAX if next prime prime > 2ˆ64. |
| primesieve_nth_prime | primesieve | Find the nth prime. By default all CPU cores are used, use primesieve_set_num_threads to change the number of threads. Note that each call to primesieve_nth_prime incurs an initialization overhead of O(sqrt(start)) even if n is tiny. Hence it is not a good idea to use primesieve_nth_prime repeatedly in a loop to get the next (or previous) prime. For this use case it is better to use a primesieve_iterator which needs to be initialized only once. |
| primesieve_prev_prime | primesieve | Get the previous prime. primesieve_prev_prime returns 0 for n <= 2. Note that primesieve_next_prime runs up to 2x faster than primesieve_prev_prime. Hence if the same algorithm can be written using either primesieve_prev_prime or primesieve_next_prime it is preferable to use primesieve_next_prime. |
| primesieve_print_primes | primesieve | Print the primes within the interval [start, stop] to the standard output. |
| primesieve_print_quadruplets | primesieve | Print the prime quadruplets within the interval [start, stop] to the standard output. |
| primesieve_print_quintuplets | primesieve | Print the prime quintuplets within the interval [start, stop] to the standard output. |
| primesieve_print_sextuplets | primesieve | Print the prime sextuplets within the interval [start, stop] to the standard output. |
| primesieve_print_triplets | primesieve | Print the prime triplets within the interval [start, stop] to the standard output. |
| primesieve_print_twins | primesieve | Print the twin primes within the interval [start, stop] to the standard output. |
| primesieve_set_num_threads | primesieve | Set the number of threads for use in primesieve_count_*() and primesieve_nth_prime. By default all CPU cores are used. |
| primesieve_set_sieve_size | primesieve | Set the sieve size in KiB (kibibyte). The best sieving performance is achieved with a sieve size of your CPU's L1 or L2 cache size (per core). sieve_size >= 16 and <= 4096 |
| primesieve_skipto | primesieve | Reset the primesieve iterator to start.
|
| primesieve_version | primesieve | Get the primesieve version number, in the form “i.j” |
| tuplets_free | primesieve | Free all prime tuplets iterator memory. |
| tuplets_init | primesieve | Initialize the prime tuplets iterator before first using it. |
| tuplets_next_quadruplet | primesieve | Get next sequence of four primes of the form (p, p+2, p+6, p+8) |
| tuplets_next_quintuplet | primesieve | Get next sequence of five primes of the form (p, p+2, p+6, p+8, p+12) or (p, p+4, p+6, p+10, p+12) |
| tuplets_next_sextuplet | primesieve | Get next sequence of six primes of the form (p, p+4, p+6, p+10, p+12, p+16) |
| tuplets_next_triplet | primesieve | Get next sequence of three primes of the form (p, p + 2, p + 6) or (p, p + 4, p + 6) |
| tuplets_next_twin | primesieve | Get next sequence of two primes of the form (p, p+2) |
| tuplets_skipto | primesieve | Reset the prime tuplets iterator to start. |
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