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There are 800 such numbers.

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Q: How many integers between 2000 and 3999 have a ones digit that is a prime number?

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No, positive integers ending with the digit 5 are divisible by 5.

Greatest 2 digit prime number is 97. Lease 2 digit prime number is 11.

23

679 is the product of the largest single-digit prime number and the largest two-digit prime number.

The largest five-digit prime number is 99,991.

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No, positive integers ending with the digit 5 are divisible by 5.

Greatest 2 digit Prime number is 97. Lease 2 digit prime number is 11.

Greatest 2 digit prime number is 97. Lease 2 digit prime number is 11.

89 is a prime number between 70 and 100 that has the ones digit one greater than the tens digit.

11 is the smallest 2-digit prime number and 97 is the greatest 2 digit prime number, so their difference is 86

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There can only be one largest two-digit prime number.

9797 is the largest two digit prime number.

679 is the product of the largest single-digit prime number and the largest two-digit prime number.

The first 'three digit' Prime Number is 101.

1637143983 is not prime. Its prime factorisation is: 3 × 3 × 7321 × 24847.In the case of this number and one ninth of all integers, the fact that it is composite can be quickly determined by calculating the core digit value, the sum of all digits reduced to one digit. The core digit value of this number is 9, and every single integer with this core digit value is a multiple of 9. This can only prove that a number is composite. A core digit value other than 9 does not prove that a number is prime.