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+# 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