Czech Amateurs 65 Full -

That night, a mysterious signal flickered on the telescope’s old spectrograph: a narrow, repeating pulse coming from a dim speck of light in the constellation Lyra. The amateurs, skeptical but curious, ran the data through a simple Python script they’d cobbled together during a coffee break. The pattern was unmistakable—a series of prime numbers, 2‑3‑5‑7‑11, pulsing every 12.4 seconds.