Subject

    Bank Exam

    Topic

    Joint Recruitment Test for 7 Banks and 1 Financial Institutions - (Senior Officers/General) - 27.11.2021

    The largest prime factor of (2⁴)²-1 is

    ক)
    3
    খ)
    5
    গ)
    17
    ঘ)
    19

    Explanation

    (2⁴)²-1 =(2⁴)²-1² =(2⁴ +1) (2⁴ -1) =(16+1)(16-1) =17×15 =17× 5×3 বৃহত্তম সংখ্যা 17

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