How can one make up for missed prayers over a period of 10 years, and what is the correct and preferred method for doing so? What is the jurisprudential opinion on making up prayers compared to Sheikh Ibn Baz's fatwas regarding the non-obligation of making them up? And is repentance and increasing in supererogatory prayers sufficient to compensate for the deficiency in obligatory prayers?

Ten years of prayers are equivalent to eighteen thousand two hundred and fifty prayers. The majority of scholars hold that it is obligatory to make up missed prayers, and this is the most cautious and the preferred view according to us, and the make-up should be done immediately. Some scholars permit making up two days' worth of prayers in a single day. As for the method mentioned of combining prayers, it forfeits the proper sequence, and many jurists believe that preserving the sequence of missed prayers is obligatory. What has been reported from Sheikh Ibn Baz - may Allah have mercy on him - regarding not making up prayers for someone who abandoned them is based on his view that abandoning prayer constitutes disbelief, and a disbeliever is not required to make up prayers once he embraces Islam. The completion of obligatory duties with supererogatory acts does not mean intentionally abandoning an obligatory duty; rather, a servant must perform what Allah has obligated upon him, then compensate for any shortcomings with supererogatory acts, and making up missed prayers is obligatory.