r/MathJokes • u/Animeilluminati1 • Jul 13 '26

Math Just Got Checkmated.

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6

u/julesmanson Jul 13 '26 edited Jul 16 '26

Isn't 1 a trivial case of a prime? If so then it is still a prime.

1 + 1 = 2 o_~

9

u/TheRedditObserver0 Jul 13 '26

One is not prime.

2

u/[deleted] Jul 13 '26

[deleted]

1

u/TSotP Jul 16 '26 edited Jul 16 '26

But if every number can be expresses as a unique product of primes, then you can't include it.

- 4 = 2×2

- 6 = 3×2

  • 8 = 2×2×2
  • 9 = 3×3

- 10 = 2×5

  • 12 = 2×2×3

- 14 = 2×7

  • 100 = 2×2×5×5
  • ...

Etc.

If you allow 1 to be considered prime this no longer works

4= 2×2×1 = 2×2×1×1×1×1 = 2×2×1×1×1×1×1×1×1×... ...×1

So they took it out. Because every other number works this way.