**Utomo Theorem**
For every prime numbers p which p + 2 is also prime, then \(2^{p+2}\) - 1 always prime.

Can you proves this conjecture?

**Utomo Theorem**
For every prime numbers p which p + 2 is also prime, then \(2^{p+2}\) - 1 always prime.

Can you proves this conjecture?

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## Comments

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TopNewestWhat you mean is the larger one of every twin prime would produce a Mersenne Prime ? Oh I need to check this out – Aditya Narayan Sharma · 4 months, 1 week ago

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It's actually easier to list the primes \(p\) which satisfy your statement than to find the list that fails it. Just compare any list of twin primes with a list of Mersenne primes, and you'll see that the \(p\) which satisfy your statement are \[p = 3, 5, 11, 17, 29, 59, 1277, 4421, 110501, 132047, \ldots\] and at this point, I got a little tired of looking.

Point being, in the first 8000 or so twin primes, only these 10 satisfy your statement, so there's no way to patch it by removing just a few errant counterexamples. – Brian Moehring · 5 months ago

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you sure that 2^43 - 1 isn't prime number :( – Budi Utomo · 5 months ago

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but, in f(p) = 2^p - 1 hasn't always gives a prime marsenne. – Budi Utomo · 5 months ago

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maybe, except just for p = 41. – Budi Utomo · 5 months ago

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From this theorem, we knew that a large primes is infinite. – Budi Utomo · 5 months ago

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See this – Brilliant Member · 5 months ago

For a counter example, take p=41, 2^43-1 is not prime.Log in to reply

Read this – Brilliant Member · 5 months ago

Actually, the numbers of the form 2^n-1 that are prime are known as Mersenne primes.Log in to reply