- Horror for every student, no, not for everyone.

I liked it in spite of not-motivated teachers(today I know other math-teachers) so much that I studied Mathematics at University.


One of my favorite themes in Mathematics is the unsolved twin-prime-problem.

Prime-numbers are natural numbers(1,2,3,4,...), wich you only can divide through 1 and through the number itself.

Twin-primes are two primes with the distance 2 (11-13, 17-19).

In school you already learn that there are an infinite number of primes. But until today there is no prove that there is an infinite number of twin-primes.

Who is interested will find here a website about it.

Here you find a German website about primes and prime-twins. Much fun!!!

The greatest primenumber found yet (12/21/2018) is:   2^82.589.933-1    a number with 24.862.048 digits. This kind of primenumbers are called Mersenne-Primes. This is the 51st and was verified by Patrick Laroche from Ocala in Florida, USA.