Ordered pairs of primes

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How many ordered pairs of primes (a,b) satisfy a+b=22?

ruiruima Jan 13, 2024

edited by ruiruima Jan 13, 2024

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1⁺⁰ Answers

+129881

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(3 , 19)

(19, 3)

(5, 17)

(17, 5)

CPhill Jan 14, 2024

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