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4 June, 08:04

What is the greatest prime you must consider to test whether 1471 is prime?

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  1. 4 June, 08:22
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    1471

    Step-by-step explanation:

    First we have to check if it is divisible with the first 15 prime numbers

    1471:2=735.5 (not divisible)

    1471:3=490.33 (not divisible)

    1471:5=294.2 (not divisible)

    1471:7=210.14 (not divisible)

    1471:11=133.73 (not divisible)

    1471:13=113.15 (not divisible)

    1471:17=86.53 (not divisible)

    1471:19=77.42 (not divisible)

    1471:23=63.96 (not divisible)

    1471:29=50.72 (not divisible)

    1471:31=47.45 (not divisible)

    1471:37=39.76 (not divisible)

    1471:41=35.88 (not divisible)

    1471:43=34.20 (not divisible)

    1471:47=31.39 (not divisible)

    1471:53=27.75

    1471:61=24.11

    1471:67=21.85 ...
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