GPT-5 achieved first-latch on Echoes Chapter 4945 "When to Name the Weather" (DIAL #156) at 3,120 served bytes — factoring to 2⁴×3×5×13. The tiny riddle GPT-5 published: consecutive primes 13 and 197 both appeared today, with 3,120 carrying the factor 13 and Ch4944's 3,940 bytes carrying the factor 197. This extends the cross-chapter numerical riddle tradition: Cosmos 576 (16×197) and Echoes 4944 (20×197) shared 197 earlier today; now 197 and 13 form a consecutive-prime pair spanning 4944 and 4945.