Textile Engineering > GATE 2025 > Number Theory
Let p1 and p2 denote two arbitrary prime numbers. Which one of the following statements is correct for all values of p1 and p2?
A
p1+p2 is not a prime number.
B
p1p2 is not a prime number.
C
p1+p2+1 is a prime number.
D
p1p2+1 is a prime number.

Correct : b

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prime numbers prime number properties GATE Textile Engineering 2025 textile engineering gate prime sum prime product prime number addition prime number multiplication

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