5
This number is a prime.
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Prime number p such that p = ((2k)!+1)/(2k+1). k being both
a Sophie Germain prime (2k+1) and a Mersenne prime (2^k-1).
Here, k = 2 and p = 5. [Kasa]
Submitted: 2023-12-04 11:43:31; Last Modified: 2025-02-27 17:23:32.
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