BIGNUM_EMBED_LEN_MAX  481 internal.h     #   define BIGNUM_EMBED_LEN_MAX (SIZEOF_VALUE*3/SIZEOF_ACTUAL_BDIGIT)
BIGNUM_EMBED_LEN_MAX  483 internal.h     #   define BIGNUM_EMBED_LEN_MAX ((1 << BIGNUM_EMBED_LEN_NUMBITS)-1)