which caliphs can memorizing al-Quran entirely

Several caliphs were known for their ability to memorize the entire Quran, including:

Caliph Abu Bakr: He was the first caliph of Islam and was known for his exceptional memory. He had memorized the entire Quran during the lifetime of Prophet Muhammad (peace be upon him).
Caliph Umar Ibn Al-Khattab: He was the second caliph of Islam and was also known for his remarkable memory. He had memorized the entire Quran during the lifetime of Prophet Muhammad (peace be upon him).
Caliph Uthman Ibn Affan: He was the third caliph of Islam and was known for his expertise in Quranic recitation and memorization. He had memorized the entire Quran and was responsible for standardizing its written form.
Caliph Ali Ibn Abi Talib: He was the fourth caliph of Islam and was known for his deep understanding of the Quran. He had memorized the entire Quran and was known for his eloquent recitation.
Caliph Al-Ma'mun: He was the seventh Abbasid caliph and was known for his love for knowledge and his dedication to the Quran. He had memorized the entire Quran and was also a skilled calligrapher