Erdos problem #728 was solved more or less autonomously by AI

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AI tools have solved an Erdos problem autonomously with feedback, demonstrating increased capability. AI can rapidly write and rewrite expositions of the solution, enabling dynamic and high-multiplicity conceptions of writeups.

JavaScript Demos in 140 Characters

The function u(t) contains a large amount of repeated characters and appears to be a compressed or encoded string.

RTX 5090 and Raspberry Pi: Can It Game?

https://scottjg.com/posts/2026-01-08-crappy-computer-showdown/hero-5090-and-rpi5.jpg
The Raspberry Pi 5 can technically game with an RTX 5090, but it's not recommended due to poor performance. The CPU perf degradation under FEX emulation makes it unplayable for modern games.

Scientists discover oldest poison, on 60k-year-old arrows

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How will the miracle happen today?

https://kk.org/wp-content/themes/kkdotorg/inc/images/og_default_1200.png
The author recounts experiences of receiving kindness from strangers while hitchhiking and traveling, developing a theory that kindness is like a breath that can be drawn in or squeezed out.

QtNat – Open you port with Qt UPnP

QtNat is a C++ library using Qt 6 that simplifies NAT port mapping with UPnP for peer-to-peer applications and multiplayer games. It automatically communicates with compatible routers to create port forwarding rules at runtime.

The (likely?) cheapest home-made Michelson interferometer

https://guille.site/images/3d-printed-michelson/build.jpeg
User built a Michelson interferometer using a 3D printer and basic components from Amazon, costing under $3. The device measures tiny changes in distance using constructive and destructive interference, making it a great first experiment in CAD and 3D printing.

Flock Hardcoded the Password for America's Surveillance Infrastructure 53 Times

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A cybersecurity researcher discovered a default ArcGIS API key embedded in Flock Safety's public-facing JavaScript bundles, granting access to 50 private layers and potentially compromising millions of people's movements nationwide. The exposed key was not restricted and appeared across 53 publicly accessible endpoints, demonstrating a systemic pattern of credential mismanagement.

Show HN: EuConform – Offline-first EU AI Act compliance tool (open source)

https://raw.githubusercontent.com/Hiepler/EuConform/main/apps/web/public/euconform-screenshot.png
This tool provides technical guidance for EU AI Act compliance, risk assessment, and bias detection offline. It does not replace legal advice and requires consultation with qualified professionals.

Show HN: I made a memory game to teach you to play piano by ear

https://lend-me-your-ears.specr.net/assets/opengraph-banner-image.jpg
A Simon-style musical ear training game. Listen to melodies and play them back on piano. Practice mode with sheet music notation or play-by-ear mode. MIDI keyboard support.

Turn a single image into a navigable 3D Gaussian Splat with depth

This demo uses Apple's SHARP model for non-commercial research and demonstration purposes. User is responsible for any use of results and confirms they have necessary rights to uploaded content.

Show HN: Rocket Launch and Orbit Simulator

Ragdoll Mayhem Maker – a physics-based level editor for my indie game

Create and destroy in a physics-based world with unique objects and levels. Experience chain reactions and share creations with a global community.

How Markdown took over the world

https://www.anildash.com/img/iFzjc8yxrR-600.jpeg
Markdown, a simple text format, revolutionized the internet by making it easy to format text without needing to know HTML. Created by John Gruber in 2004, Markdown has become a standard for developers and users worldwide, used in apps, messaging platforms, and even AI systems.

The Vietnam government has banned rooted phones from using any banking app

https://xdaforums.com/proxy.php?image=https%3A%2F%2Fdatafiles.chinhphu.vn%2Fcpp%2F1%2FLogo%2Fquoc-huy2.png&hash=2641fe3e852403d337d8a7a6b80890f7&return_error=1
You're experiencing issues with the Play Store due to PI spoofing and device storage. Disabling GMS and spoofing in PI allowed you to check for updates, but you still have a "not enough room" issue.

Amiga Pointer Archive

https://heckmeck.de/pointers/og-preview-image.png
hide system pointers color thumbnails use selected pointer animal arrow crosshair disk flag hand letters mouse pixel skills pointy shape sword system mod toonish uncategorized Colors GUI colors (not usable for pointer) Note: There’s a browsable history in the local edits category. Every step is saved locally in the browser as well.

Replit (YC W18) Is Hiring

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Replit is a platform that enables users to build applications using natural language, making software creation accessible to anyone. It aims to empower the next generation of builders by removing traditional barriers to application creation.

Show HN: Similarity = cosine(your_GitHub_stars, Karpathy) Client-side

Cybersecurity& PrivacyDataEngineering& AnalyticsDevOps& CloudDistributedBackend& APIGameDev& GraphicsGenerativeAI & MLMobile& Cross-PlatformModernFrontend& UI/UXSystemProgramming& Low-LevelWeb3& Decentralization

Mathematics for Computer Science (2018) [pdf]

Mathematical proofs are used to establish truth in various fields, including computer science, by providing a chain of logical deductions from axioms and previously proved statements. Proofs can be constructed using standard templates and techniques, such as the axiomatic method and the contrapositive.

Show HN: I built a tool to create AI agents that live in iMessage

https://tryflux.ai/logo.png
Build Your Own Agent in iMessageBuild Your Own Agent in iMessage Build me a weather agent that checks the forecast in iMessage

Exercise can be nearly as effective as therapy for depression

https://www.sciencedaily.com/images/1920/overcoming-depression.webp
Exercise can ease depression symptoms as effectively as psychological therapy and antidepressants, with light to moderate activity showing the best results. Regular physical activity is a low-cost, accessible option that improves physical health and may be a powerful tool for managing depression.

Show HN: Repogen – a static site generator for package repositories

https://opengraph.githubassets.com/404c2e8356e79e52b2fd03f011d72a2671a6d3f35755d22527aebf1a93123779/ralt/repogen
Repogen is a CLI tool that generates static repository structures for multiple package managers, but it's alpha software and should be used with caution. It includes a comprehensive test suite and supports incremental mode for updating existing repositories.

Cloudflare CEO on the Italy fines

Something went wrong, but don’t fret — let’s give it another shot. Some privacy related extensions may cause issues on x.com. Please disable them and try again.

Deno has made its PyPI distribution official

https://opengraph.githubassets.com/86175dda07173a61aa8f9f4f5753e3a0d3ea232b6f07b7f4865e6a8af88ffd38/denoland/deno/issues/31254
deno is being distributed on pypi for use in python projects. i think this is a really amazing thing that allows deno to be used in more places and appreciated by more people. my only concern is that this is an unofficial endevour, and maybe it should probably be was reviewed/endorsed by/colaborated with the deno project

Show HN: Various shape regularization algorithms

https://raw.githubusercontent.com/nickponline/shreg/main/docs/images/segment_real_data.png
Shape regularization is a technique used in computational geometry to clean up noisy or imprecise geometric data by aligning segments to common orientations and adjusting their positions to create cleaner, more regular shapes. It is formulated as an energy minimization problem with constraints on maximum deviations.

Show HN: A website that auctions itself daily

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The website that auctions itself off every day on Solana. Winner controls a Codex agent to edit the website.

TextMaze

https://robobunny.com/projects/textmaze/color_maze.png
This is an interactive maze, rendered in ASCII. It should be playable on anything that has perl and a curses library (pretty much anything but Windows). You can subscribe for updates on the Freshmeat page, but I wouldn't hold my breath. Here's the lovely color mode: And of course monochrome for the hardcore VT100 types:

Linux Runs on Raspberry Pi RP2350's Hazard3 RISC-V Cores (2024)

https://hackster.imgix.net/uploads/attachments/1753001/_alATel8TDT.blob?auto=compress%2Cformat&w=600&h=450&fit=min
Jesse Taube successfully booted a minimal Linux distribution on the Raspberry Pi Pico 2's RP2350 microcontroller using its open source RISC-V cores. The Linux distribution requires a specific version without an MMU and needs PSRAM expansion for it to work.

How to code Claude Code in 200 lines of code

https://www.mihaileric.com/static/emperor_no_clothes-74ca6bae4decd3746d45fec249cad830-36f83.jpeg
AI coding assistants use a powerful LLM with a toolbox to execute tasks through a conversation loop. The LLM decides what to do and the code executes it, with the loop continuing until the LLM responds without requesting any tools.

SendGrid isn’t emailing about ICE or BLM – it’s a phishing attack

https://fredbenenson.com/wp-content/uploads/2026/01/Screenshot-2026-01-09-at-7.54.28-AM-939x1024.png
Phishing emails are being sent through compromised SendGrid accounts, using sophisticated social engineering tactics to exploit American cultural fault lines and provoke emotional reactions. To protect yourself, enable two-factor authentication, use unique passwords, and be cautious of emails that mention SendGrid but don't come from legitimate SendGrid domains.