A, B, A+B are semiprimes

 
Definition:   A semiprime is the product of two (not necessarily distinct) prime numbers.

In this puzzle, I will restrict to semiprimes that are the product of two distinct primes.

 

A,B,A+B 1

A,B,A+B 2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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About benvitalis

math grad - Interest: Number theory
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