diff --git a/92/main.ua b/92/main.ua
index c599e04..d359978 100644
--- a/92/main.ua
+++ b/92/main.ua
@@ -1,7 +1,5 @@
-# next number in chain
-N ← /+⍉°√⊥10
+N ← memo(/+⍉°√⊥10) # memoize, because we get many repeated 1s
 
-⍜-⇡1 1e7
-⍥N10       # the longest 1-chain is less than 10
--⊙1e7 ⧻⊚=1 # count 1s to subtract from 1e7
--1         # there are 999999 nums, because no 0
+°△ 1e4_1e3    # chunk the input
+wait≡pool⍥₁₀N # thread each chunk of size 1e3
+-⊃(⧻⊚=1|-₁⧻♭)