Prove or disprove: the sum of two primes is a prime.
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two sum of two prime is always composite..
eg. a prime no. X
then X+X=2X
there are two dactors other than 1and the no. it self as 2&X
or eg2.
7+5=12 it is again composite
but there is an exception case with 2&3
eg. a prime no. X
then X+X=2X
there are two dactors other than 1and the no. it self as 2&X
or eg2.
7+5=12 it is again composite
but there is an exception case with 2&3
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