52 lines
1.6 KiB
C
52 lines
1.6 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) 2008, Peter Shrimpton
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Copyright (C) 2009 William Hart
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******************************************************************************/
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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int
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n_is_strong_probabprime_precomp(mp_limb_t n, double npre, mp_limb_t a,
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mp_limb_t d)
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{
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mp_limb_t t = d;
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mp_limb_t y;
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y = n_powmod_ui_precomp(a, t, n, npre);
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if (y == UWORD(1))
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return 1;
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t <<= 1;
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while ((t != n - 1) && (y != n - 1))
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{
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y = n_mulmod_precomp(y, y, n, npre);
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t <<= 1;
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}
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return (y == n - 1);
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}
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