Difference between revisions of "There are infinitely many primes"

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m (I changed some technical details in the proof and added the key components of it to the table.)
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'''There are infinitely many primes''' is a claim in number theory which states that any finite set of prime numbers will be followed by some larger prime number somewhere along the number line. The claim was proven, among other ways, through [[Reductio ad absurdum]]. The first known instance of a proof dates back to Euclid, c. 300 B.C.{{Cite web|url=https://primes.utm.edu/notes/proofs/infinite/euclids.html|title=Euclid's Proof of the Infinitude of Primes (c. 300 BC)|last=Caldwell|first=Chris K.|date=Unknown Publication Date|publisher=Prime Pages, University of Tennessee at Martin|access-date=January 17, 2022}}.
'''There are infinitely many primes''' is a claim in number theory which states that any finite set of prime numbers will be followed by some larger prime number somewhere along the number line. The claim was proven, among other ways, through [[Reductio ad absurdum]]. The first known instance of a proof dates back to Euclid, c. 300 B.C.{{Cite web|url=https://primes.utm.edu/notes/proofs/infinite/euclids.html|title=Euclid's Proof of the Infinitude of Primes (c. 300 BC)|last=Caldwell|first=Chris K.|date=Unknown Publication Date|publisher=Prime Pages, University of Tennessee at Martin|access-date=January 17, 2022}}.


The proof consists in imagining the series of all prime numbers if that series was finite. Multiplying all those prime numbers together and subtracting 1 from the product, one would necessarily arrive at a very large number which would also be co-prime to all other prime numbers. Thus that number would have to be a multiple of some other primes, thus showing that the initial series of prime number was incomplete. Iterating this operation, this means that there can be no finite set of all prime numbers.
The proof consists of assuming the series of all prime numbers to be finite. Multiplying all those prime numbers together and adding 1, one would arrive at an integer bigger than 1 which would be co-prime to all prime numbers. Thus that number would have to be a multiple of some other primes, showing that the initial series of prime numbers was incomplete. This is a contradiction, so the initial assumption has to be false.


{{Claim
{{Claim
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|Level=Proven
|Level=Proven
|Nature=Theoretical
|Nature=Theoretical
|Counterclaim=There are a finite amount of prime numbers
|Counterclaim=There is a finite amount of prime numbers
|DependentOn1=
|DependentOn1=An integer and it's successor are co-prime
|DependentOn2=Any integer bigger than 1 is the multiple of a prime
|Dependency of=-
|Dependency of=-
}}
}}

Revision as of 17:23, 18 January 2022

There are infinitely many primes is a claim in number theory which states that any finite set of prime numbers will be followed by some larger prime number somewhere along the number line. The claim was proven, among other ways, through Reductio ad absurdum. The first known instance of a proof dates back to Euclid, c. 300 B.C.[1].

The proof consists of assuming the series of all prime numbers to be finite. Multiplying all those prime numbers together and adding 1, one would arrive at an integer bigger than 1 which would be co-prime to all prime numbers. Thus that number would have to be a multiple of some other primes, showing that the initial series of prime numbers was incomplete. This is a contradiction, so the initial assumption has to be false.

Claim
Statement of the claim There are infinitely many primes
Level of certainty Proven
Nature Theoretical
Counterclaim There is a finite amount of prime numbers
Dependent on

An integer and it's successor are co-prime
Any integer bigger than 1 is the multiple of a prime

Dependency of

References

  1. Caldwell, Chris K. (Unknown Publication Date) Euclid's Proof of the Infinitude of Primes (c. 300 BC). Prime Pages, University of Tennessee at Martin. Accessed on January 17, 2022.