How did Indonesia become the biggest Muslim country?

Sources: Akhbar al-Sin wa'l-Hind (851); al-Muhallabi, al-'Azizi 1:137–138; Ibn Battuta, Rihla, ed. al-Tazi, 4:106–117; Ma Huan, Ying-yai Sheng-lan, trans. Mills; Tomé Pires, Suma Oriental, trans. Cortesão; the Leran, Lamreh, Samudera Pasai, Trowulan, Gresik and Kudus inscriptions; Qur'an 55:26–27 and 3:97; Dukcapil civil registry (end of 2025). Researched with Qaf.
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