05-20-2019, 04:34 PM

Hello

I found a strange behaviour in the prime numbers.

About 33.8% of the prime numbers ending by 9 are followed by a prime number ending by 1. On the contrary, only about 15.9% of the prime numbers ending by 3 are followed by a prime number ending by 3 (the same applies with 7 followed by 7 with 15.8%).

The table is as followed :

ending by, followed by, % vs primes endind by

1, 1, 17.1%

1, 3, 31.0%

1, 7, 31.8%

1, 9, 20.1%

3, 1, 23.3%

3, 3, 15.9%

3, 7, 29.1%

3, 9, 31.7%

7, 1, 25.7%

7, 3, 27.4%

7, 7, 15.8%

7, 9, 31.0%

9, 1, 33.8%

9, 3, 25.8%

9, 7, 23.3%

9, 9, 17.1%

Therefore, if you search for a prime number following another one, use this table to maximize your chances.

—- edit —-

Change % to the « primes ending by » instead of to the « total nb of primes ».

I found a strange behaviour in the prime numbers.

About 33.8% of the prime numbers ending by 9 are followed by a prime number ending by 1. On the contrary, only about 15.9% of the prime numbers ending by 3 are followed by a prime number ending by 3 (the same applies with 7 followed by 7 with 15.8%).

The table is as followed :

ending by, followed by, % vs primes endind by

1, 1, 17.1%

1, 3, 31.0%

1, 7, 31.8%

1, 9, 20.1%

3, 1, 23.3%

3, 3, 15.9%

3, 7, 29.1%

3, 9, 31.7%

7, 1, 25.7%

7, 3, 27.4%

7, 7, 15.8%

7, 9, 31.0%

9, 1, 33.8%

9, 3, 25.8%

9, 7, 23.3%

9, 9, 17.1%

Therefore, if you search for a prime number following another one, use this table to maximize your chances.

—- edit —-

Change % to the « primes ending by » instead of to the « total nb of primes ».