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Challenges

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Challenges Solve Goldbach's Conjecture

MATL, 19 bytes XH:YqtZ*!tsH=f1Z)Z) Try it online! I'm still a novice at MATL, so I am all ears to any improvements. XH:YqtZ*!tsH=f1Z)Z) XH - copy implicit input to H clipboa...

posted 2y ago by south‭

Answer
#1: Initial revision by user avatar south‭ · 2022-03-10T15:34:40Z (over 2 years ago)
# [MATL](hub.com/lmendo/MATL), 19 bytes
```
XH:YqtZ*!tsH=f1Z)Z)
```
[Try it online!](https://tio.run/##y00syfn/P8LDKrKwJEpLsaTYwzbNMEozSvP/f0MDAA)

I'm still a novice at MATL, so I am all ears to any improvements.
```
XH:YqtZ*!tsH=f1Z)Z)
XH                  - copy implicit input to H clipboard
  :                 - range 1..n
   Yq               - vectorized n-th prime
     t              - duplicate
      Z*            - cartesian product
        !           - transpose
         t          - duplicate
          s         - sum columns
           H=       - paste from clipboard H and vectorized equal
             f      - find indices of nonzeros
              1Z)   - first index returned from f
                 Z) - use that index to find first pair from Z*!
```