• CompassRed@discuss.tchncs.de
    ·
    1 year ago

    2 may be the only even prime - that is it's the only prime divisible by 2 - but 3 is the only prime divisible by 3 and 5 is the only prime divisible by 5, so I fail to see how this is unique.

    • Huschke@programming.dev
      ·
      edit-2
      1 year ago

      Exactly, "even" litterally means divisible by 2. We could easily come up with a term for divisible by 3 or 5. Maybe there even is one. So yeah 2 is nothing special.

  • AssortedBiscuits [they/them]
    ·
    1 year ago

    The meme works better if it's 1 instead of 2. 1 is mostly not considered a prime number because a bunch of theorems like the fundamental theorem of arithmetic would have to be reworked to say "prime numbers greater than 1." However, just because 1 is not a prime number doesn't mean it's a composite number, so 1 is a number that is neither prime nor composite.

    • Collatz_problem [comrade/them]
      ·
      1 year ago

      2 is a prime number, but shit ton of theorems only apply to odd prime numbers, and a lot of other theorems treat 2 as a special separate case, because it behaves weirdly.

    • wischi@programming.dev
      ·
      1 year ago

      And how is "even" special? Two is the only prime that's divisible by two but three is also the only prime divisible by three.

      • Whirlybird@aussie.zone
        ·
        1 year ago

        Well 2 is the outlier because it’s the only even prime. It might not be “special” but it is unique out of all of the prime numbers.

        • wischi@programming.dev
          ·
          1 year ago

          "even" just means divisible by two. So it's not unique at all. Two is the only prime that's even divisible by two and three is the only prime that's divisible by three. You just think two is a special prime because there is a word for "divisible by two" but the prime two isn't any more special or unique in any meaningful way than any other prime.

          • Whirlybird@aussie.zone
            ·
            1 year ago

            It’s unique because all the others are odd numbers. This is crazy that you’re trying to argue this.

            • wischi@programming.dev
              ·
              1 year ago

              Of couse all the others are odd because otherwise they wouldn't be prime. All primes after three are also not divisible by three... "magic". The only difference is that there are is no word like "even" or "odd" for "divisible by three" or "not divisible by three".

              • Whirlybird@aussie.zone
                ·
                1 year ago

                only difference is that there are is no word like “even” or “odd” for “divisible by three” or “not divisible by three”.

                Yep, hence why 2 is unique - there is a word to describe numbers that are divisible by 2, and 2 is the only one of those that is a prime number.

                It seems that you don't know what the word "unique" means.

    • huf [he/him]
      ·
      1 year ago

      9 isnt prime, it's divisible by 7

      just not very well...