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What not is not a prime number out of 1057, 157, 3163, 263
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1 vote
What not is not a prime number out of
1057, 157, 3163, 263

User Charlie Schliesser
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2 Answers

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1,057 is not a prime number. 
User Dkeck
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2 votes
A prime number only has the factors: 1 and itself.

1057 in this case a composite number because it has factors of: 1,7,151,1057
User Kashana
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