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-   -   Number 99919 (https://www.mersenneforum.org/showthread.php?t=24302)

enzocreti 2019-04-16 10:23

Number 99919
 
99919 is what a friend of mine has called super-brilliant number.


In fact, it has two prime factors of three digits each and sumdigits of the prime factors is the same




99919=163*613




two prime factors each with 3 digits, the sum of the digits of 163 is 10 and the sum of the digits of 613 is 10.


Is this the only number composed by two prime factors which is super-brilliant and the prime factors of it are a permutation of the digits of the other? In fact 613 is a permutation of the digits of 163...
Can you find other examples with two prime factors?

petrw1 2019-04-16 14:19

Can't you make as many as you want by picking the prime factors first?

137x317= 43429 and many more.


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