why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime

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pleasehelp5213 pleasehelp5213

04-09-2019
Mathematics

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why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime

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Dlalex2316 Dlalex2316 · Answer 1 · 2019-09-04T15:54:44+02:00

Dlalex2316 Dlalex2316

04-09-2019

Step-by-step explanation:

because 7 is the highest prime number that when squared is less than 100, 11 yhe next prime number when squared is 121. As such all non-prime numbers less than 100 will be a would have prime factors of either 2, 3, 5 & 7

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why is there no need to go further than the multiples of 7 when checking if a number less than 100 is prime