• Stefan Christensen (unregistered) in reply to Nick

    Alas but it is not a prime number. 1 is not a prime number, it is unity. Smalest prime number is 2. But it should be fairly easy for a computer program to find a prime number of that size.

  • Chad (unregistered) in reply to Nick

    One is not prime. Sorry.

  • Tom (unregistered) in reply to Nick
    Nick:
    16 digit prime number?

    Leading zeros count as digits right?

    0000000000000001

    Done!

    If only 1 would be a prime number ...

  • Anonymous (unregistered) in reply to Tom
    Tom:
    Nick:
    16 digit prime number?

    Leading zeros count as digits right?

    0000000000000001

    Done!

    If only 1 would be a prime number ...

    Are you sure its not?

  • A.T. (unregistered) in reply to Nick
    Nick:
    16 digit prime number?

    Leading zeros count as digits right?

    0000000000000001

    Done!

    Nope, 1 isn't prime.

  • Roger Wolff (unregistered) in reply to Nick

    0000000000000001 Wrong! For sixteen digit primes your options start at 0000000000000002 and 0000000000000003.

  • Anonymous Coward (unregistered) in reply to Nick

    It's a shame 1 isn't actually prime!

  • Brian (unregistered) in reply to Nick

    1 isn't prime

  • Troll (unregistered) in reply to Brian

    You're all wrong. 1 really is prime!

  • André (unregistered) in reply to Nick

    Sorry, but that's not a prime number.

    Nice explanation why.

  • André (unregistered) in reply to J

    Perhaps it's easier just to hit "reply" in a featured comment than to spend time reading all the replies so far only to make a gigantic post of bitcherdom.

  • Jasn (unregistered) in reply to Nick

    1 isn't a prime number. You just crashed the system!

  • immibis (unregistered) in reply to Nick
    Nick:
    16 digit prime number?

    Leading zeros count as digits right?

    0000000000000001

    Done!

    ...Everyone knows 1 isn't prime. Your failing to enter a ONE-DIGIT PRIME NUMBER with 15 zeroes in front is TRWTF.

  • AdT (unregistered) in reply to my_math_is_not_well
    my_math_is_not_well:
    I must admit I don't see the beauty or potential of this. Most maths concepts will work in any base you choose to represent numbers, this only works in base 10. In any other base you'd get a different set of numbers. (I think - I haven't verified my claim)

    No prime can be unique with respect to all possible bases.

    Proof by contradiction: Let p be a prime that is unique with respect to all bases. Let q be any other prime. Let b = p*q.

    Now both 1/p and 1/q are finite fractions in base b, and even have the same length (one digit after the period, whose value is q or p, rsp.). So even if we allow a period length of zero to indicate finite fractions, p is not unique wrt b.

  • AdT (unregistered) in reply to André
    André:
    Sorry, but that's not a prime number.

    Nice explanation why.

    TRWTF is that they write that 2 is "odd" because it's the only even prime. Insert the definition of evenness, and you get: "2 is 'odd' because it is the only prime divisible by 2."

    Which is really funny because for any prime p, p is the only prime divisible by p. See also Fallacies of definition.

  • Ed (unregistered) in reply to Nick

    I believe you mean 0000000000000002

  • J. L. tympanum (unregistered) in reply to Nick

    Well, no. 1 is not a prime. Try 0000000000000002

  • JoC (unregistered)

    That is really quite genius. You can easily check your messages from a foreign hottie's bed when you wake up.

  • Wizou (unregistered)

    +1 ;-)))

  • (cs) in reply to sep332
    sep332:
    3093215881333057 1746860020068409 9999999900000001

    I could only find three - any other suggestions?

    The primes must be unique, where uniqueness (well,every number is unique, isn't it?) is defined in the wiki article mentioned above.

  • MiepMiep (unregistered) in reply to Nick
    Nick:
    16 digit prime number?

    Leading zeros count as digits right?

    0000000000000001

    Done!

    0000000000000002 would have been the smallest prime number ;)

  • IHadToSayIt (unregistered) in reply to Nick

    Mmm.. Err..1 is neither prime nor composite.

    Maybe 0000000000000003?

    :)

  • Grahack (unregistered) in reply to Nick

    Sorry, 1 is not a prime number.

  • miguel_from_spain (unregistered)

    People keep suggesting to use 0000000000000002, which is prime, but not unique. Keep trying.

  • pipedings (unregistered) in reply to Nick

    bzzt, the smallest Prime is 2.

    Quoting Wikipedia:

    In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. An infinitude of prime numbers exists, as demonstrated by Euclid around 300 BC. The first thirty-four prime numbers are:

  • jaqque (unregistered) in reply to Nick

    One isn't prime.

  • Anonymous Howard (unregistered) in reply to Nick

    Since when is one considered a prime number? Since we did away with the fundamental theorem of arithmetic (JFGI) in the last revolution?

    One is generally considered to be in a separate class, neither prime nor composite for this very reason.

  • Martin (unregistered) in reply to Nick

    Gah! That is not a prime number. Please try again!

  • Anon (unregistered) in reply to Nick

    1 is not prime

  • Mike Pone (unregistered) in reply to Nick

    Except that 1 isn't prime. http://wiki.answers.com/Q/Is_1_prime

  • mwn (unregistered)

    HAS ANYONE MENTIONED THAT ONE IS NOT A PRIME NUMBER YET??????????????? I AM OUTRAGED ABOUT MATH AND CAN NO LONGER READ WORDS

  • Ragnara (unregistered) in reply to Nick

    But... 1 is no prime number... sigh

  • Mike (unregistered) in reply to Nick

    1 is not a prime number. try 0000000000000002

  • (cs) in reply to AdT
    AdT:
    my_math_is_not_well:
    I must admit I don't see the beauty or potential of this. Most maths concepts will work in any base you choose to represent numbers, this only works in base 10. In any other base you'd get a different set of numbers. (I think - I haven't verified my claim)

    No prime can be unique with respect to all possible bases.

    Proof by contradiction: Let p be a prime that is unique with respect to all bases. Let q be any other prime. Let b = p*q.

    Now both 1/p and 1/q are finite fractions in base b, and even have the same length (one digit after the period, whose value is q or p, rsp.). So even if we allow a period length of zero to indicate finite fractions, p is not unique wrt b.

    Can we un-feature the article responsible for prime idiocy and replace it with this one?

    This has to be a first for TDWTF -- a post that actually extends the boundaries of mathematical knowledge, albeit in a fairly small way. It was actually worth wading through all that drivel to find it.

  • unique prime (unregistered)

    9,999,999,900,000,001

  • pjp (unregistered) in reply to Nick

    that would work except 1 isnt prime. Prime means that it is divisible by 1 AND itself

  • Andres (unregistered) in reply to Nick

    You mean"

    0000000000000002

    ;)

  • PSmith (unregistered) in reply to Nick

    1 is not a prime number!

  • - (unregistered) in reply to Nick

    Except 0000000000000001 isn't prime, 0000000000000002 maybe?

  • (cs) in reply to Nick
    Nick:
    16 digit prime number?

    Leading zeros count as digits right?

    0000000000000001

    Done!

    Nope. 0000000000000002, 0000000000000003, 0000000000000005, 0000000000000007, but not 0000000000000001, which is NOT PRIME

  • (cs) in reply to J
    J:
    NO TIME TO READ THE OTHER 37 COMMENTS THAT SAY 1 IS NOT A PRIME NUMBER! ...
    Actually, I think the "Featured Comment" system is to blame... most of these people probably never saw the other 37 comments, since the 000000000000001 comment was the last featured one.

    Which is REALLY too bad, because I LOVED the comments that mentioned:

    my_math_is_not_well:
    ... I have no idea what a unique prime is, but wikipedia says there's only one with 16 digits.

    http://en.wikipedia.org/wiki/Unique_prime

    Which makes it even more WTF-y. I mean, why prompt for it when there's only one valid input?

    QwikFix:
    ... Although, how can your favorite one not be the one with a period length of 294? How the hell did that happen?
    real_aardvark:
    ...It is possible to generalize this to other bases...

    If I could summon up the energy, it wouldn't be too difficult to prove or disprove that there exists a set of unique primes across all radixes.

    AdT:
    ... No prime can be unique with respect to all possible bases.

    Proof by contradiction:...

    (note: I'm not a mathmatician, but even if I can't understand it, the math looks cool)

    Even THIS one had some tiny value that could have mitigated the slew of "1" posts:

    Anonymous Coward:
    ...

    As for those of you who want 16 unique one-digit prime numbers, here: 2, 3, 5, 7, ♂ (11), ♪ (13), ◄ (17), ‼ (19), ↨ (23), ↔ (29), ▼ (31), % (37), ) (41), + (43), / (47), Ö (53)

    (Yes, I just used Alt+(Number)).

    Now if only someone had invented some kind of comment rating system for the masses, since obviously Alex gets bored of featuring them after a while...

  • Anonymous (unregistered) in reply to Nick

    1 is not prime.

  • Anonymous (unregistered) in reply to Anonymous

    Oops, didn't see all these other messages. Sorry for the redun-dunce.

  • Andy (unregistered) in reply to Nick

    Don't want to be picky, but "1" is neither a prime nor a composite. But 0000000000000002 will do ;-)

  • Andy (unregistered) in reply to Andy
    Andy:
    Don't want to be picky, but "1" is neither a prime nor a composite. But 0000000000000002 will do ;-)

    Sorry, didn't see all the replies. My bad.

  • (cs)

    Is it just me who thinks that 1 is not a prime number?

  • John (unregistered) in reply to DoctorFriday

    or multiply smaller primes until you get a 16-digit number, then add 1 ?

  • John (unregistered) in reply to real_aardvark

    No, no, no ... the REAL WTF is that when you enter a 16-digit number (and none of this silliness about leading zeroes, hexadecimal or other crap, please) the software quickly CHECKS IT for primeness and continues.

    Factoring large prime numbers is distinctly non-trivial, and the software can't be using a lookup table - there must be millions of 16-digit primes - notwithstanding the Wikipedia article about 'Unique primes'. Didn't the original 'article' just say enter a 16-digit prime number ?

  • John (unregistered)

    Oh yeah, I checked. It did say 'enter a unique 16-digit prime number', but if the comments I've seen tonight are any indication, it was written by someone with only a vague idea of what a prime is, so they used a vague description, not a mathematical one.

    All primes are unique in the ordinary sense of the word, all ordinal numbers are unique. That's why they're called ordinal.

    Sheesh!

  • (cs) in reply to John
    John:
    No, no, no ... the REAL WTF is that when you enter a 16-digit number (and none of this silliness about leading zeroes, hexadecimal or other crap, please) the software quickly CHECKS IT for primeness and continues.

    Factoring large prime numbers is distinctly non-trivial,

    However, checking for large primes with a reasonable degree of confidence is relatively easy. And 16 digits isn't especially large, in this case.

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