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Microsoft degrades functionality of perpetually-licensed offline products

https://consumerrights.wiki/w/Microsoft_Office_2019_and_2021_for_Mac_view-only_conversion_(2026)
469•antipurist•3h ago•144 comments

Domain expertise has always been the real moat

https://www.brethorsting.com/blog/2026/05/domain-expertise-has-always-been-the-real-moat/
320•aaronbrethorst•6h ago•194 comments

Shantell Sans (2023)

https://shantellsans.com/process
111•aleda145•5h ago•10 comments

I found a seashell in the middle of the desert

https://github.com/Hawzen/I-found-a-seashell-in-the-middle-of-the-desert
235•Hawzen•2d ago•66 comments

Racket v9.2 is now available

https://blog.racket-lang.org/2026/05/racket-v9-2.html
39•spdegabrielle•2d ago•2 comments

Accenture to acquire Ookla

https://newsroom.accenture.com/news/2026/accenture-to-acquire-ookla-to-strengthen-network-intelli...
247•Garbage•10h ago•126 comments

wolfSSL releases a new product; wolfCOSE a zero alloc C embbedded COSE stack

https://github.com/wolfSSL/wolfCOSE
69•aidangarske•6h ago•13 comments

Cheese Paper: a text editor specifically designed for writing

https://brie.gay/cheese-paper/
61•sohkamyung•4h ago•9 comments

Jef Raskin, the Visionary Behind the Mac (2013)

https://lowendmac.com/2013/jef-raskin-the-visionary-behind-the-mac/
76•tylerdane•7h ago•38 comments

Voxel Space (2017)

https://s-macke.github.io/VoxelSpace/
253•davikr•12h ago•57 comments

Zig ELF Linker Improvements Devlog

https://ziglang.org/devlog/2026/#2026-05-30
176•kristoff_it•9h ago•52 comments

The AV2 Video Standard Has Released (Final v1.0 Specification)

https://av2.aomedia.org
39•ksec•5h ago•1 comments

Parallel Reconstruction of Lawful TLS Wiretapping

https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping/
62•jerrythegerbil•7h ago•31 comments

OpenRouter raises $113M Series B

https://openrouter.ai/announcements/series-b
368•freeCandy•9h ago•182 comments

Openrsync: An implementation of rsync, by the OpenBSD team

https://github.com/kristapsdz/openrsync
325•sph•16h ago•144 comments

Gustav Klimt and Egon Schiele in Conversation (2018)

https://www.theparisreview.org/blog/2018/01/31/the-drawings-of-klimt-and-schiele/
22•rballpug•2d ago•3 comments

Dusklight – GC Twilight Princess Decompiled

https://twilitrealm.dev/
72•shepherdjerred•6h ago•10 comments

Show HN: 500 years of Joseon court omens as an observability dashboard

https://ajin.im/is/building/omen.ops/
84•poppypetalmask•7h ago•14 comments

Design Engineering Magazine

https://interfaces.dev/
66•hnhsh•6h ago•6 comments

Microcode inside the Intel 8087 floating-point chip: register exchange

https://www.righto.com/2026/05/microcode-inside-intel-8087-floating.html
91•pwg•9h ago•16 comments

90% of the T Distribution

https://entropicthoughts.com/ninety-percent-of-the-t-distribution
30•ibobev•3d ago•7 comments

Pandoc Templates

https://pandoc-templates.org/
368•ankitg12•17h ago•48 comments

Zig: Build System Reworked

https://ziglang.org/devlog/2026/#2026-05-26
324•tosh•18h ago•210 comments

Rotary GPU: Exploring Local Execution for Large MoE Models Under Limited VRAM

https://arxiv.org/abs/2605.29135
23•dryarzeg•6h ago•4 comments

Show HN: Open Envelope – an open schema for defining AI agent teams

https://openenvelope.org/docs/schema/
32•ashconway•2d ago•2 comments

Navier-Stokes fluid simulation explained with Godot game engine

https://myzopotamia.dev/navier-stokes-fluid-simulation-explained-with-godot
190•myzek•4d ago•24 comments

Werner Herzog in conversation with Paul Cronin (2014)

https://fsgworkinprogress.com/2014/09/26/insignificant-bullets-evil-poachers-and-l-a-culture/
77•Michelangelo11•10h ago•24 comments

Leo's first encyclical attacks technological messianism

https://www.economist.com/europe/2026/05/28/leos-first-encyclical-attacks-technological-messianism
192•1vuio0pswjnm7•16h ago•211 comments

C++ CLI for folder encryption with AES-256-GCM and USB-based key loading

10•nextma•2d ago•2 comments

It takes two neurons to ride a bicycle (2004)

https://fermatslibrary.com/s/it-takes-two-neurons-to-ride-a-bicycle#email-newsletter
99•malshe•4d ago•46 comments
Open in hackernews

Right-Truncatable Prime Counter

https://github.com/EbodShojaei/Right-Truncatable-Primes
9•rainmans•1y ago

Comments

throwawaymaths•1y ago
Curious about base 2. Obviously if you hit a 0 it's immediately not prime, but maybe adjust the rules so:

- you drill through as many 0's on the right.

- you finish on 1.

3, 5, 7, 11, 13, 15, 17 are all right truncatable, 19 is the first non-truncatable prime in this scheme.

nh23423fefe•1y ago
i dont think smaller radixes make the problem more interesting. the problem is interesting because base 10 has a large branching factor
throwawaymaths•1y ago
I think in the base2 reformulation I propose we do not know for certain if the list of numbers terminates, as all Fermat primes are in the set and we don't know if there are infinitely many Fermat primes.

For base-10 and the original rules the set is provably closed.

"Drilling through zeros" makes the branching unbounded.

jinwoo68•1y ago
There's a Project Euler problem for finding truncatable prime numbers, from both left and right: https://projecteuler.net/problem=37
thechao•1y ago
Just in case any else is wondering: there are only 83 right-truncatable primes (RTP) and that is it. There's two constraints that let you see this "immediately":

1. An RTP must start with {2,3,5,7,9}; and,

2. An RTP must end with {1,3,7,9}.

So, let's take the largest RTP (73939133) and try to "extend" it: there are only four possible extensions: 73939133[1], 73939133[3], 73939133[7], 73939133[9]. None of these are prime. This holds for the other 8-digit RTPs. Therefore, there is no extension to a 9-or-longer RTP. Thus, the list is exhaustive.