frontpage.
newsnewestaskshowjobs

Open Source @Github

fp.

Mistral Large 4

https://docs.mistral.ai/models/mistral-large-4-0
454•Philpax•1h ago•229 comments

Mistral Large 4: "Le Chonk"

https://mistral.ai/news/mistral-large-4/
193•j-bu•1h ago•21 comments

Release of Polars 2.0

https://pola.rs/posts/release-polars-2/
139•simicd•2h ago•21 comments

Nobel Prize in Physics goes to Francis Halzen

https://www.nobelprize.org/prizes/physics/2026/
274•solarist•4h ago•77 comments

Tapo (Rust/Python library) now speaks TP-Link's TPAP protocol

https://mihai.dinculescu.dev/posts/tapo-speaks-tpap/
24•faithraven•40m ago•2 comments

JetBrains reported a net financial loss first time in its tracked history

https://www.helgilibrary.com/companies/jetbrains
273•thw_9a83c•2h ago•275 comments

Show HN: Parseable, an open observability datalake, handles 100M time-series/min

https://www.parseable.com
11•yashdotrv•1h ago•2 comments

Meta's Muse Is an Adorable Privacy and Security Dumpster Fire

https://www.techdirt.com/2026/10/06/metas-muse-is-an-adorable-privacy-and-security-dumpster-fire/
116•beardyw•1h ago•32 comments

Mathematics of Geothermal Energy

https://www.ebsco.com/research-starters/power-and-energy/mathematics-geothermal-energy/
15•srameshc•1h ago•4 comments

Gleam doesn't compile to Erlang source anymore

https://gleam.run/news/gleam-doesnt-compile-to-erlang-source-anymore/
141•ingve•6h ago•42 comments

Benchmark in Milliseconds

https://matklad.github.io/2026/10/05/benchmark-milliseconds.html
9•surprisetalk•21h ago•0 comments

Show HN: Jotbus – a shared encrypted scratchpad for coding agents

https://jotbus.com/
8•shake-n-fries•51m ago•2 comments

Nature's capacity to 'bounce back' when species are lost is vastly overestimated

https://phys.org/news/2026-10-nature-capacity-species-lost-vastly.html
115•pseudolus•3h ago•51 comments

Beam: Reflection's 501B open-weight model

https://reflection.ai/blog/introducing-beam
492•Philpax•19h ago•160 comments

Screens Aren't Destroying Young Minds. I Should Know

https://humanprogress.org/screens-arent-destroying-young-minds-i-should-know/
21•obscurette•44m ago•19 comments

World's First enhanced geothermal power plant completed in just 23 months

https://techcrunch.com/2026/10/01/worlds-first-enhanced-geothermal-power-plant-completed-in-just-...
64•hochmartinez•3h ago•13 comments

Find the flattest route between any two points in SF

https://flattensf.com/
247•ishan0102•16h ago•87 comments

Two ARM64-specific compiler optimization bugs, in GCC 15/16 and Rust, hit curl

https://mastodon.social/@bagder/117392573268225646
14•torutofu•1h ago•3 comments

Dust: Pretraining Transformers Without Backpropagation

https://qlabs.sh/research/dust
239•E-Reverance•17h ago•62 comments

Friendship ended with Deno, now Node is my best friend

https://dbushell.com/2026/10/03/deno-to-node/
242•ibobev•16h ago•153 comments

Accountability mechanisms can be joyful (2024)

https://liquidbrain.net/blog/accountability-and-joy/
63•luu•2d ago•22 comments

Opus 5.5 agents discover two room-temperature magnetic semiconductor candidates

https://www.vals.ai/blogs/room-temperature-magnetic-semiconductors
414•outlier99•17h ago•283 comments

Direct retinal projection display for smart glasses using a meta-optic mirror

https://www.tdk.com/en/news_center/press/20261002_01.html
63•bookofjoe•3d ago•22 comments

Competitive Programmer's Handbook (2018) [pdf]

https://cses.fi/book/book.pdf
250•vinhnx•3d ago•59 comments

Example.com just launched the biggest redesign in decades

https://www.debugbear.com/blog/example-dot-com-redesign-history
277•jgx0•15h ago•186 comments

Mistral Large 4

https://twitter.com/MistralAI/status/2107456586813730854
54•apt-get•1h ago•4 comments

ASOS app users receive push notifications apparently sent by hackers

https://www.bbc.co.uk/news/articles/cj62ylzpr6d3o
52•helsinkiandrew•4h ago•31 comments

Testing 12 different Zigbee temperature/humidity sensors

https://smarthomescene.com/reviews/best-selling-zigbee-temperature-sensors-tested/
161•walrus01•2d ago•93 comments

The complement of true is true, except when it's false

https://dryperspective.github.io/posts/complement-of-true/
40•aw1621107•2d ago•10 comments

Resurrecting iChat Audio and Video Conferencing

https://blog.pipetogrep.org/2026/09/11/resurrecting-ichat-audio-and-video-conferencing/
83•thepipetogrep•10h ago•23 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.