Monday, January 3, 2011

Palindromic Primes

How many palindromic primes with an even number of digits are there?
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9 comments:

  1. Mr_zerauJJanuary 4, 2011 at 12:33 AM

    This comment has been removed by the author.

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  2. Mr_zerauJJanuary 4, 2011 at 12:35 AM

    not known

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  3. BenVitaleJanuary 4, 2011 at 8:01 AM

    Actually, there's only one palindromic prime that satisfy that condition: the number 11.
    All other palindromic numbers with an even number of digits are composites.

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  4. Mr_zerauJJanuary 4, 2011 at 12:14 PM

    Can you demonstrate this for all numbers? ;-) (Certainly, very interesting)

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  5. Mr_zerauJJanuary 4, 2011 at 12:45 PM

    The number 3 in binary satisfy de condition (is 11 in binary)
    No eight-digit binary number that is prime, is
    palindrome than 11!! (isn't it?)

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  6. Mr_zerauJJanuary 4, 2011 at 12:56 PM

    In hexa 100 prime numbers (in hexa) only 11 !!!
    Is the definition ofa prime number the number that is 11 in some base, or the prime palindroms in all the bases??? ;-)

    jajajajajaja

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  7. BenVitaleJanuary 4, 2011 at 2:05 PM

    Check the following 2 proofs at

    http://users.skynet.be/worldofnumbers/palprim1.htm

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  8. Mr_zerauJJanuary 5, 2011 at 12:30 AM

    ZEN-KIU (Thanks) SIR!!!!!

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  9. BenVitaleJanuary 5, 2011 at 12:45 AM

    You're welcome.

    ReplyDelete

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