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The non-prime numbers between 81 and 87 are 82, 84, 85, and 86. 82 is not prime because it is divisible by 2: 82 divided by 2 equals 41. 84 is not prime because it is divisible by 2: 84 divided by 2 equals 42. 85 is not prime because it is divisible by 5: 85 divided by 5 equals 17. 86 is not prime because it is divisible by 2: 86 divided by 2 equals 43. I hope this helps! Let me know if you have any other questions.
517 divided by 6 equals 86 with a remainder of 1.
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