Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > Factor the Giant > Editorial

Factor the Giant — Solution & Editorial

Back to the Problem

Trial division to √N (109 steps) is too slow. Use Miller–Rabin to test primality and Pollard's rho to split composites recursively.

Complexity: O(n1/4) per factor (expected)

Watch out: Semiprimes of two ~109 primes are precisely the case where √N trial division dies — rho is required.