| struct_approximer_t | Structure used to find number approximation |
| struct_binary_array_t | Defines an array of bits |
| struct_binary_matrix_t | Defines a matrix of bits |
| struct_byte_array_t | Defines an array of bytes |
| struct_byte_matrix_t | Defines a matrix of bytes |
| struct_cfrac_params_t | Defines the variable parameters used in the CFRAC algorithm |
| struct_cont_frac_state_t | An ad-hoc structure for the computation of the continued fraction of a square root |
| struct_ecm_params_t | Defines the variable parameters used in ECM |
| struct_factoring_machine | Defines a structure to represent the logic behind all factorization algorithms |
| struct_factoring_program | Defines a structure to represent the logic behind all factorization programs |
| struct_fermat_params_t | Defines the variable parameters used in Fermat's algorithm (dummy structure) |
| struct_hashtable_entry_t | The structure of a hashtable's entry |
| struct_hashtable_t | A basic implementation of a hashtable |
| struct_int32_array_t | Defines an array of int32 |
| struct_linked_list_node_t | A basic implementation of a linked list node |
| struct_linked_list_t | A basic implementation of a linked list |
| struct_mpz_array_list_t | Defines a list of mpz_array_t |
| struct_mpz_array_t | Defines an array of mpz_t elements from the GMP library |
| struct_mpz_pair_t | A pair of mpz_t integers |
| struct_mult_data_t | Ad hoc structure used in the computation of the multiplier to use |
| struct_siqs_params_t | Defines the variable parameters used in the SIQS algorithm |
| struct_siqs_poly_t | Defines polynomials used by SIQS |
| struct_siqs_sieve_t | Defines the sieve used by SIQS |
| struct_smooth_filter_t | Structure grouping variables needed for multi-step early abort strategy |
| struct_squfof_params_t | Defines the variable parameters used in the SQUFOF algorithm (dummy structure) |
| struct_stopwatch_t | Defines a very basic stopwatch-like timer |
| struct_uint32_array_list_t | Defines a list of uint32_array_t |
| struct_uint32_array_t | Defines an array of uint32 |
| struct_uint32_tuple_t | Defines a tuple of integers together with a sorting key |