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