Cognition engineer Eric Lu used the Devin AI agent to factor RSA-260, a 260-digit, 862-bit semiprime from the 1991 RSA Factoring Challenge, on September 3, consuming about 4,900 GPU-days at roughly $4…
Cognition engineer Eric Lu posted a prime factor of RSA-260 on September 3, 2026, and Anthropic technical staff member Stephen A. Weis published the two 135-digit primes behind RSA-896 on September 19…
Anthropic engineer Stephen Weis used Claude to factor RSA-896, a 270-digit, 896-bit number, in 10 days on up to 2,048 GPUs, pushing the public RSA factoring record from 862 to 896 bits 16 days after C…
Researcher Stephen A. Weis factored RSA-896, a 270-decimal-digit semiprime, on September 19, 2026 with help from Anthropic's Claude AI model, moving the public factoring record from 862 bits to 896 bi…
Mixfont released Ghost Font in July 2026, an animated dot pattern that encodes text in motion, making it unreadable in a paused frame. Creator Eric Lu and Mixfont reported that models labeled Claude F…
Scientists have developed a 'Ghost Font' that uses motion to write messages readable by humans but indecipherable by AI, leaving even advanced models like Fable and GPT Sol 5.6 Ultra baffled. Develope…
Software engineer Eric Lu launched Ghost Font, a dynamic typographic tool that uses motion to hide messages from AI models while remaining readable to humans, as part of his ongoing Mixfont project ex…
Designer Eric Lu's Ghost Font uses an optical illusion to hide text from AI by overlaying words within moving dots in a video, exploiting the fact that multimodal AI examines videos frame by frame whi…
Eric Lu created a font called Ghost Font that only humans can read, and tested it with AI models Fable and GPT 5.6 Sol Ultra, which failed to decipher it correctly.…