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anonymous

  • 4 years ago

Here is one from number theory... Prove that there are infinitely many primes.....

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  1. anonymous
    • 4 years ago
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    4p+3 will be a prime for all prime p lets assume p is the last prime then 4p+3 is also a prime this contradicts our assumption hence there are infinitly many primes

  2. anonymous
    • 4 years ago
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    but how can u tell that 4p+3 is a prime?

  3. anonymous
    • 4 years ago
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    as p is prime 4p is multiple of 1,2 4,p if you add three nothing factors out so it is a prime

  4. anonymous
    • 4 years ago
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    as for me, i've heard of these proofs: Euclid's Proof (c. 300 BC) Furstenberg's Topological Proof (1955) Goldbach's Proof (1730) Kummer's Restatement of Euclid's Proof Filip Saidak's Proof (2005)

  5. anonymous
    • 4 years ago
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    Yeah sure

  6. anonymous
    • 4 years ago
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    http://openstudy.com/study#/updates/4f29d875e4b049df4e9df1b3

  7. phi
    • 4 years ago
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    4*13+3 = 55 which is composite to do your proof, you must create the number formed by multiplying ALL primes less than or equal the presumed last prime. then add 1. this number will be divisible by all smaller primes, but with a remainder of 1. So there must be a bigger prime than the presumed last prime.

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