Amateur armed with ChatGPT solves an Erdős problem

https://static.scientificamerican.com/dam/asset/124ad289-58c2-4d51-87e8-aee854d10fc7/abstract-rubiks-cube.jpg?m=1777033076.511&w=600
A 23-year-old man named Liam Price used ChatGPT Pro to solve a 60-year-old math problem left by Paul Erdos. The AI's solution, which was posted online, appears to be original and may have broader applications in mathematics.

Why has there been so little progress on Alzheimer's disease?

USB Cheat Sheet (2022)

https://fabiensanglard.net/usbcheat/typeb3.svg
A USB cheat sheet was created to clarify USB terms and save time. It covers USB versions, lane striping and bonding, and wire configurations for different USB speeds.

Tell HN: An app is silently installing itself on my iPhone every day

Headspace app is silently appearing on iPhone 13 Pro around 1pm EST daily. Reports of similar issue on Reddit suggest it may be a widespread iOS issue.

Mahjong: A Visual Guide

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A mahjong set has 136 tiles with 34 unique designs, four of each, and honor tiles. A winning hand is 4 sets + 1 pair, totaling 14 tiles, with the pair called the "eyes".

Flickr: The first and last great photo platform

https://petapixel.com/assets/uploads/2026/04/Flickr-The-First-and-Last-Great-Photo-Platform-800x420.jpg
Flickr remains a unique online community for photography enthusiasts, offering robust features and a sanctuary from algorithm-driven content. Its Pro subscription provides benefits like unlimited storage, ad-free galleries, and exclusive savings, justifying the cost for many users.

My Homemade PBX (2002)

https://wandel.ca/homepage/pbx_small.jpg
I've been fascinated with telecommunications from an early age. When I was twelve or so I had an intercom system from which I could talk to most of the house from my corner of the kids' room. It was made out of the amplifier from a record player, and miscellaneous parts from old TV sets. When I was fourteen someone gave me a WW2 vintage shortwave receiver with a blown power supply. I ...

OpenAI Privacy Filter

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OpenAI releases Privacy Filter, a small model for detecting and redacting PII in text, designed for high-throughput privacy workflows and context-aware detection. It achieves state-of-the-art performance on the PII-Masking-300k benchmark and can be fine-tuned for different data distributions and privacy policies.

EU Age Control: The trojan horse for digital IDs

The Free Universal Construction Kit

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The Free Universal Construction Kit is a set of adapters that allows children's construction toys to work together, promoting creative play and hybrid designs. The Kit is a grassroots remedy for proprietary toy systems, available for free download and 3D printing.

1-Bit Hokusai's "The Great Wave" (2023)

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User is recreating Hokusai's 36 views of Mount Fuji as 1-bit pixel art on old Macintosh computers for nostalgia and flow state. They use Aldus SuperPaint 3.0 on Quadra 700 or PowerBook 100 to create authentic 512x342 pixel images.

Using coding assistance tools to revive projects you never were going to finish

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The user tested Claude Code with a personal project, a shim between YouTube Music and OpenSubsonic API, and found it helpful in implementing the project from scratch. The user was able to get a working service in a short evening, but still has concerns about relying too much on AI coding assist and losing skills.

The Joy of Folding Bikes

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I recently started using a folding bike, a Brompton, which has greatly improved my commuting experience. It's convenient, durable, and cost-effective, paying for itself in just 28 weeks.

America's Geothermal Breakthrough

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The US geothermal energy sector is expanding with support from the government and innovations in enhanced geothermal technologies. Companies like Fervo Energy are leading the way with new projects and technologies to access geothermal resources.

DeepSeek-V4 on Day 0: From Fast Inference to Verified RL with SGLang and Miles

https://www.lmsys.org/images/blog/deepseek_v4/benchmark_vs_oss.png
DeepSeek-V4 is supported on both inference and RL training with SGLang and Miles forming the first open-source stack to serve and train it on launch day. The system combines hybrid sparse-attention architecture, manifold-constrained hyper-connections, and FP4 expert weights with various optimizations and kernel-level improvements to achieve high throughput and efficiency.

The Super Nintendo Cartridges

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The Super Nintendo had various enhancement chips, including the SA-1, CX4, and GSU-1, which improved performance and added features to games. These chips were used in a total of 72 games.

Math Is Hard – OpenBSD Stories

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The VAX architecture had a simple exception model with traps and faults, but the kernel had to skip the instruction in case of a fault to prevent a signal loop, which was not possible due to the hardware design. A fix was implemented in 2002 to add a skip_opcode function to compute the address of the next opcode, effectively skipping the offending instruction, and it was later carried over to OpenBSD.

Per-image PCA characterization of the Kodak image suite (PDF and JSON)

https://opengraph.githubassets.com/799bca105fb1ea8a4a020565275167e80ee5cd5242d98c99cf24a5b7471dd373/PearsonZero/kodak-pcd0992-statistical-characterization
Per-image principal component decomposition of the Kodak Lossless True Color Image Suite (PCD0992). First published statistical characterization of inter-channel redundancy structure across all 24 images. - kodak-pcd0992-statistical-characterization/baseline at main · PearsonZero/kodak-pcd0992-statistical-characterization

New 10 GbE USB adapters are cooler, smaller, cheaper

https://www.jeffgeerling.com/blog/2026/new-10-gbe-usb-adapters-cooler-smaller-cheaper/thunderbolt-and-usb-c-10g-ethernet-adapters.jpg
A new 10G USB 3.2 adapter from WisdPi offers a compact alternative to bulky Thunderbolt adapters, but its performance depends on the USB port's bandwidth. It reaches full 10 Gbps speed only with a USB 3.2 Gen 2 2x2 port, otherwise it's slower.

Reviving BrowserID in 2026

You're building WKID, a BrowserID-style identity provider for your personal projects. WKID is a lightweight, federated, and private IdP that uses email domains for authentication, allowing you to control your own authentication flows.

The Long Reply

https://storage.ghost.io/c/99/08/9908ec0b-b3d5-476b-bc3c-632c5b087809/content/images/size/w2000/2026/04/header-1.jpg
The author shared a post about a man named Noah who posts photos of the same tree every year, and it went viral. The author also shared their own experiences with long-term replies, including one from 25 years ago.

Hokusai and Tesselations

https://dl.ndl.go.jp/contents/14036633/thumb.jpg
アイテム詳細画面 - 国立国会図書館デジタルコレクション マイコレクションに追加したコマはありません 画像調整(「画像の傾き・範囲」「色調」)は印刷する 全てのコマ に反映されます。 国立国会図書館デジタルコレクションでのクッキーの使用 当ウェブサイト(https://dl.ndl.go.jp/ 及び https://rekion.dl.ndl.go.jp/)は、図書館サービスとしてウェブサイトを機能させるために必要なクッキー(Cookie)を使用しています。また、当ウェブサイトの利用状況を計測し、改善に役立てるためのアクセス解析クッキーを設定することもありますが、このクッキーは、利用者が同意した場合にのみ設定されます。同意はいつでも取り消すことができます。

Optimizing Datalog for the GPU

The George Business, by Roger Zelazny (1980)

George hired a dragon named Dart to abduct a woman named Rosalind, so he could win her hand in marriage. However, the plan failed when Rosalind married another suitor instead.

GnuPG – post-quantum crypto landing in mainline

Werner Koch wk at gnupg.org Fri Apr 24 13:52:45 CEST 2026 Hello! We are pleased to announce the availability of a new GnuPG release: Version 2.5.19. This release adds a few new features and fixes a couple of bugs. The main features in the 2.5 series are improvements for 64 bit Windows and the introduction of Kyber (aka ML-KEM or FIPS-203) as PQC encryption algorithm. Other than PQC support ...

Shall We Play a Game?

https://asteriskmag.com/media/pages/issues/14/shall-we-play-a-game/b4f85ae95a-1776212473/jon_kriegsspiel-300x.jpg
Jon Peterson is an expert on the history of wargames, and the tabletop role-playing games that they spawned. His books include Playing at the World, on simulated combat from chess to Dungeons & Dragons, The Elusive Shift, on the evolution of role-playing, and Game Wizards, on the legal feuds that shaped the early history of D&D. One of us (Clara) has spent more time than she’d like to ...

Simulacrum of Knowledge Work

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Report quality is often judged by superficial measures like writing style, not actual content. This can lead to reliance on AI-generated work, where appearance of quality is prioritized over actual value.

What async promised and what it delivered

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The evolution of concurrency abstractions, from threads to callbacks to promises to async/await, has improved the local experience of writing async code but introduced new costs and complexities at the global level, such as function coloring and ecosystem fragmentation. Each solution solved a problem but introduced new structural costs, and language designers are now reevaluating the approach ...

Mine, an IDE for Coalton and Common Lisp

https://coalton-lang.github.io/mine/mine-banner800.png
mine is an IDE for Coalton and Common Lisp on Windows, macOS, and Linux. It offers a complete, all-in-one application and a command-line variant with integrated REPL, debugger, and structural editing.

What the FCC router ban means for FOSS

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The FCC banned new US-made home routers due to national security concerns, but existing devices and FOSS routers like OpenWrt are unaffected. The FCC's decision may restrict software updates to existing hardware, but users can still install community software like OpenWrt.