Does the prayer of one afflicted with obsessive doubts become invalid if he bases his action on the greater number of prostrations when in doubt, despite the cessation of the obsessive doubt for two days prior to the prayer?

Since the waswas (whispers/obsessive thoughts) ceased for two days, the doubt is not chronic (mustankah), and one must base their action on the minimum, especially as the predominant assumption aligns with basing it on the minimum. Therefore, the prayer mentioned is invalid and must be repeated.