FR - Siret validation issue

[hsmett]

The SIREN number consists of 9 digits.
This number must pass the Luhn algorithm test.

The SIRET number consists of 14 digits. It begins with the SIREN number, followed by 5 other digits.
The SIRET number must also pass the Luhn algorithm test, with the exception of La Poste (356 000 000 XXXXX), which benefits from a special rule allowing it to have more numbers available.

Right now it seems to me that the SIRET number is not fully validated.

Source:

Les numéros SIREN, NIC et SIRET intègrent le mécanisme de contrôle de parité connu sous le nom de formule (ou clé) de Luhn.
https://xml.insee.fr/schema/siret.html#controles

[benkonrath]

There is a Luhn test on the first 9 digits of the SIRET number which is exactly the validation check for the SIREN number. See the validation here:

django-localflavor/localflavor/fr/forms.py

Lines 260 to 262 in 6a5bada

	if not self.r_valid.match(value) or not luhn.is_valid(value[:9]) or \
	(value.startswith("356000000") and sum(int(x) for x in value) % 5 != 0):
	raise ValidationError(self.error_messages['invalid'], code='invalid')

Do you have an example that you can share that's not working correctly?