What is prime a × prime B = 57, prime a + prime B = 57

What is prime a × prime B = 57, prime a + prime B = 57

57=3×19
So prime a + prime B = 3 + 19 = 22

ABCD is four rational numbers with absolute values of 1, 2, 3 and 4. Q: can a + B + C + d be equal to - 1? Why?

ABCD is four rational numbers with absolute values of 1, 2, 3 and 4
Let | a | = 1. | B | = 2, | C | = 3, | D | = 4
They were divided into groups a, B, C and D
The value of a + B is - 3, - 1,1,3
The value of C + D is - 7, - 1,1,7
The addition of - 3, - 1,1,3 and - 7, - 1,1,7 can not get - 1
So a + B + C + D cannot be equal to - 1

It is known that a.b.c.d is a rational number, the absolute value of (a-b) is less than or equal to 9, the absolute value of (C-D) is less than or equal to 16, and the absolute value of (a-b-c + D)
And the absolute value of (a-b-c + D) is less than or equal to 25
The absolute value of (B-A) minus the absolute value of (d-c)!

25=|a-b-c+d|=|(a-b)+(d-c)|