Is prayer obligatory for one whose menstruation ceased for four months, then a small amount came for three days and ceased for a month, then came twice in one month in a small amount for one day with white discharge?

The three days during which the menstrual period returned are considered menstruation, and ghusl (ritual bath) is obligatory upon seeing the signs of purity thereafter. If a woman sees blood twice, in a very small amount, within a day and a night, it is menstruation, and ghusl becomes obligatory upon its cessation. However, if the blood does not reach this duration, it is not considered menstruation according to the majority of scholars, although it is more prudent to perform ghusl to avoid scholarly disagreement.