How to enter my mobile phone number for registration in facebook

I am trying to register with facebook, but I am asked for my mobile number.

I tried every possible combination of number, but it always said I entered an invalid number.

I choose France as the country and then I entered the following numbers (not real number, but the number starts with a '0'; a french mobile number always has 10 digits including the leading zero):

0123456789
123456789
330123456789
33123456789
00330123456789
0033123456789
+330123456789
+33123456789

None of these worked. Is there a problem with facebook?