It consists of seven verses and there is no difference concerning this. Amr bin Ubaid said that it consists of eight verses and Husayn al-Juafi said that it consists of six verses but both of these opinions are irregular and rejected.
They have differed concerning the statement “with the Name of Allah, the All-Merciful, the Most Merciful.” The majority of reciters of Kufa postulate that it comprises an independent verse of al-Fatihah and this is also the opinion of a group of Sahabah, Tabi’in and a large group of the later scholars. However the reciters and jurists of Madinah regard it to be part of a verse, and not an independent verse, or not a verse at all.
Those who postulate that it is not a verse of al-Fatihah state that the seventh verse commences with the words, “not [the path] of those who have earned [Your] anger…” (ath-Thalabi records this view from Abu Hurayrah as per as-Suyuti, vol 1, pg 42)
Al-Fathah consists of twenty-five words and one hundred and thirteen letters. (al-Baghawi, vol 1, p51)
The Spiritual Cure: An Explanation of Surah Al-Fatihah prepared and translated by Abu Rumaysah Page 27