Twin primes

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Revision as of 06:03, 26 July 2020 by rosettacode>JusC (Created page with "{{task}} Twin primes are pairs of natural numbers(P1 and P2) that satisfy the following: # P1 and P2 are primes # P1 + 2 = P2 Write a program that displays the number of t...")
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Task
Twin primes
You are encouraged to solve this task according to the task description, using any language you may know.


Twin primes are pairs of natural numbers(P1 and P2) that satisfy the following:

  1. P1 and P2 are primes
  2. P1 + 2 = P2

Write a program that displays the number of twin primes that can be found under a user-inputted number.

Examples below:

Output:
> Search Size: 100
> 8 twin prime pairs.

> Search Size: 1000
> 35 twin prime pairs.
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