76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
|
/*=============================================================================
|
||
|
|
|
||
|
|
This file is part of FLINT.
|
||
|
|
|
||
|
|
FLINT is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
FLINT is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with FLINT; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
|
||
|
|
=============================================================================*/
|
||
|
|
/******************************************************************************
|
||
|
|
|
||
|
|
Copyright (C) 2013 Martin Lee
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <time.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <gmp.h>
|
||
|
|
|
||
|
|
#include "flint.h"
|
||
|
|
#include "nmod_poly.h"
|
||
|
|
|
||
|
|
int main (void)
|
||
|
|
{
|
||
|
|
|
||
|
|
double t;
|
||
|
|
nmod_poly_t f, g, h;
|
||
|
|
for (int i= 15001;i < 16000; i++)
|
||
|
|
{
|
||
|
|
nmod_poly_init2 (f, 17, i/2+1);
|
||
|
|
nmod_poly_init2 (g, 17, i+1);
|
||
|
|
|
||
|
|
nmod_poly_set_coeff_ui (f, i/2, 1);
|
||
|
|
nmod_poly_set_coeff_ui (f, 1, 1);
|
||
|
|
nmod_poly_set_coeff_ui (f, 0, ((i%17)*(i%17)+3) % 17);
|
||
|
|
|
||
|
|
nmod_poly_set_coeff_ui (g, i, 1);
|
||
|
|
nmod_poly_set_coeff_ui (g, i/2+1, 1);
|
||
|
|
nmod_poly_set_coeff_ui (g, 1, ((i % 17)+1)%17);
|
||
|
|
nmod_poly_set_coeff_ui (g, 0, 15);
|
||
|
|
|
||
|
|
nmod_poly_init (h, 17);
|
||
|
|
nmod_poly_gcd (h, f, g);
|
||
|
|
|
||
|
|
if (!nmod_poly_is_one (h))
|
||
|
|
{
|
||
|
|
flint_printf ("i= %d\n", i);
|
||
|
|
nmod_poly_factor_t factors;
|
||
|
|
nmod_poly_factor_init (factors);
|
||
|
|
t= clock();
|
||
|
|
nmod_poly_factor (factors, h);
|
||
|
|
t = (clock() - t) / CLOCKS_PER_SEC;
|
||
|
|
flint_printf("factorization %.2lf\n", t);
|
||
|
|
nmod_poly_factor_clear (factors);
|
||
|
|
}
|
||
|
|
|
||
|
|
nmod_poly_clear (f);
|
||
|
|
nmod_poly_clear (g);
|
||
|
|
nmod_poly_clear (h);
|
||
|
|
}
|
||
|
|
return EXIT_SUCCESS;
|
||
|
|
}
|