# Why is 143 not a primenumber?

## Answer

A prime number is a positive integer that has exactly two positive integer factors. 1 and itself. 11 x 13 =143 ,so 143 is not a prime number
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Q&A Related to "Why is 143 not a prime number?"
 11 x 13 = 143. http://wiki.answers.com/Q/Why_143_is_not_a_prime_n...
 The prime factorization of 143 is: 11 x 13 http://wiki.answers.com/Q/What_prime_numbers_multi...
 11*13=143 http://wiki.answers.com/Q/What_two_prime_number_mu...
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