Amazing Prime Numbers

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Offline sadia.ameen

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Amazing Prime Numbers
« on: July 25, 2013, 12:48:12 PM »
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.

Offline Farhana Israt Jahan

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Re: Amazing Prime Numbers
« Reply #1 on: July 29, 2013, 05:17:50 PM »
Interesting...
Farhana Israt Jahan
Assistant Professor
Dept. of Pharmacy

Offline maruppharm

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Re: Amazing Prime Numbers
« Reply #2 on: November 09, 2013, 09:41:29 PM »
Wow... very amazing.
Md Al Faruk
Assistant Professor, Pharmacy

Offline shirin.ns

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Re: Amazing Prime Numbers
« Reply #3 on: March 31, 2014, 11:44:47 AM »
It's really amazing!
Shirin Sultana
Lecturer (Mathematics)
Dept. of General Educational Development (GED)
Daffodil International university