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607 and Level 6

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607 is the sum of the three prime numbers from 197 to 211.

Print the puzzles or type the solution on this excel file: 10 Factors 2015-09-01

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How do we know that 607 is a prime number? If 607 were not a prime number, then it would be divisible by at least one prime number less than or equal to √607 ≈ 24.6. Since 607 cannot be divided evenly by 2, 3, 5, 7, 11, 13, 17, 19, or 23, we know that 607 is a prime number.

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