Find whether 5*7*11*13+11 is a prime number or a composite number
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Answered by
50
5×7×11×13+11
=11(5×7×13+1)
=11×456
since the product of these nos. will have more than 2 factirs(1,11,456,no. itself ) it is a composite no.
=11(5×7×13+1)
=11×456
since the product of these nos. will have more than 2 factirs(1,11,456,no. itself ) it is a composite no.
Answered by
30
11 (5×7×13+1)
=11 (91×5+1)
=11 (455+1)
=11 (456)
here , no. is multiplied by 11 which is a prime no.
as we know that factors of composite no. are prime numbers
=11 (91×5+1)
=11 (455+1)
=11 (456)
here , no. is multiplied by 11 which is a prime no.
as we know that factors of composite no. are prime numbers
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