Educational > Interesting Maths

Amazing Prime Numbers

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sadia.ameen:
Here are few amazing prime numbers, these prime numbers were proved by the XVIIIth century.

31
331
3331
33331
333331
3333331
33333331
The next number 333333331 is not a prime number. Whereas it is multiplied by 17 x 19607843 = 333333331.

Farhana Israt Jahan:
Interesting...

maruppharm:
Wow... very amazing.

shirin.ns:
It's really amazing!

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