from nx_crypto_ec.c:162
static NX_CRYPTO_CONST HN_UBASE _nx_crypto_ec_secp256r1_b[] =
{
HN_ULONG_TO_UBASE(0x27D2604B), HN_ULONG_TO_UBASE(0x3BCE3C3E),
HN_ULONG_TO_UBASE(0xCC53B0F6), HN_ULONG_TO_UBASE(0x651D06B0),
HN_ULONG_TO_UBASE(0x769886BC), HN_ULONG_TO_UBASE(0xB3EBBD55),
HN_ULONG_TO_UBASE(0xAA3A93E7), HN_ULONG_TO_UBASE(0x5AC635D8)
};