## Sum of four primes

Published:

First read the problem description.

The Goldbach’s conjecture has been proved up to \(4*10^{18}\), which is enough for our problem. We set `p1 = 2`

and `p2 = 2`

if `n`

is even or `p2 = 3`

if `n`

is odd. So that the sum of `p3 >= 3`

and `p4 >= 3`

needs to be even.

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