have h3 : (digits 10 c).length < 6 ∨ (digits 10 c).length ≥ 6 := by apply lt_or_ge
n : ℕ
h1 : ProblemPredicate n
c : ℕ
h2 : ProblemPredicate' c n
⊢ n ≥ 153846
n : ℕ
h1 : ProblemPredicate n
c : ℕ
h2 : ProblemPredicate' c n
h3 : (digits 10 c).length < 6 ∨ (digits 10 c).length ≥ 6
⊢ n ≥ 153846