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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...
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#1: Initial revision
# [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*! ```