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ຂັ້ນ​ຕອນ​ຕໍ່​ຂັ້ນ​ຕອນ

1. \sqrt{101} \approx 10

   Only primes up to √101 need testing: any factor above it pairs with one below.

2. 101 \bmod 2 = 1

   2 does not divide 101.

3. 101 \bmod 3 = 2

   3 does not divide 101.

4. 101 \bmod 5 = 1

   5 does not divide 101.

5. 101 \bmod 7 = 3

   7 does not divide 101.

6. \text{101 is prime}

   No prime up to the square root divides it, so it has no factors other than 1 and itself.

ເປີດ​ເຜີຍ​ຄຳ​ຕອບ

\text{101 is prime}