# project euler 87
P      ← =1/+≠1°/×
Primes ← ⍥(⊂2)>2⟜(▽⊸P+1⍜÷₂(⇡⌊))
Primes 6
# +24°√⊣ # 7080 -> 50112265
⧅≥3
≡↻[1 2 3]¤⍉
◴/⊂⍉
/+ⁿ[2 3 4]⍉
⧻⊚<50