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/*
Copyright (C) 2009 William Hart
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "test_helpers.h"
#include "ulong_extras.h"
TEST_FUNCTION_START(n_factor_pp1, state)
{
int i, j, result;
ulong count = UWORD(0);
for (i = 0; i < 300 * flint_test_multiplier(); i++) /* Test random numbers */
{
ulong n1, n2;
do
{
n1 = n_randtest_bits(state, n_randint(state, FLINT_BITS) + 1);
} while (n_is_prime(n1) || (n1 < UWORD(2)));
for (j = 0; j < 20; j++)
{
n2 = n_factor_pp1(n1, 1000000, n_randint(state, n1 - 3) + 3);
if (n2 > 1) break;
}
if (n2 > 1)
{
count++;
result = ((n1%n2) == UWORD(0));
if (!result)
TEST_FUNCTION_FAIL("n1 = %wu, n2 = %wu\n", n1, n2);
}
}
if (count < 295 * flint_test_multiplier())
TEST_FUNCTION_FAIL("Only %wu numbers factored\n", count);
TEST_FUNCTION_END(state);
}