Twin primes

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

P1 and P2 are primes
P1 + 2 = P2

Twin primes
You are encouraged to solve this task according to the task description, using any language you may know.

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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