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Diffstat (limited to '')
| -rw-r--r-- | src/math/subgroup.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/math/subgroup.c b/src/math/subgroup.c index fdf45a5..0b5c515 100644 --- a/src/math/subgroup.c +++ b/src/math/subgroup.c @@ -3,6 +3,7 @@ * Copyright (C) 2017-2018 J08nY */ #include "subgroup.h" +#include "io/output.h" /** * @brief All prime divisors of a given integer with multiplicity. @@ -46,6 +47,11 @@ static GEN subgroups_2n_factors(GEN factors, size_t min_bits) { long nprimes = glength(factors); if (nprimes == min_bits) return NULL; GEN amount = int2n(nprimes); + long abits = logint(amount, gen_2); + if (abits >= 64) { + fprintf(err, "Too many factors to generate points (%li bits).", abits); + return NULL; + } GEN groups = gtovec0(gen_0, itos(amount) - (min_bits * nprimes) - 1); size_t i = 0; |