Benjamin Carlu retweeted
Je suis agent SNCF et participe à des opérations de recrutement pour le groupe SNCF depuis 7 ans.
Vous la voulez la vérité ?
Déroulez ⤵️
Malgré un taux de chômage au plus haut, "44% des entreprises ont des difficultés de recrutement", constate le directeur général de France Travail
l.bfmtv.com/FzcT
Benjamin Carlu retweeted
Je vous le dis en douce…
La France cherche : à produire de l’énergie, améliorer tous ses transports légers comme lourds, moderniser son armement, ses infrastructures, sa médecine, sa justice et son ingénierie.
A votre disposition si besoin d’aide sur nos métiers 🚂🚄🛠️
Qui bosse pour faire un @anduriltech ou @FirePointUA français ?
Je suis éloigné des sujets de défense, mais on a un tissu industriel, des jachères à reviatiliser et on est champion du Système D.
Il manque un truc ?
Le poids règlementaire / commande publique est trop fort ?
Benjamin Carlu retweeted
PCBs made in America. Twice as fast as Shenzhen.
Today @CircuitHub is unveiling The Grid, our factory-scale robot in Massachusetts that builds circuit boards on demand.
No changeovers, no per-design setup. Prototypes and production batches, fully automated.
Benjamin Carlu retweeted
25 years ago today, we introduced the iPod. 1,000 songs in your pocket.
A small team. An unforgiving deadline. We had months to bring the hardware, software, and music experience together. Proud of what we built and that it means so much to people still today. A device that has been woven in many ways into our lives. People have filled their iPods with road trips, breakups, workouts, special occasions with family and friends.
How cool that the iPod has become part of culture and our stories. 25 years, it’s hard to believe! Celebrating the team that made it happen today 👏
@StevenLevy was there from the start @WIRED wired.com/story/im-still-con…
#Backforum2026
La conférence annuelle des vendeurs sur Backmarket.
~100 vendeurs du monde entier, présents qui font 80% des 3,5Md$ de GMV de Back Market.
- Sourcing
- confiance
- marge
→ les 3 défis historique du reconditionné, toujours d'actualité !
Back Market 2026 en qq chiffres :
- 56% du marché européen 😳
- 1 appareil vendu toutes les 5 s
- 1,5 M de reprises en 2025 (+30%/an). #Backforum2026
Présentation du Robot BackBot d'AppKudos :
test automatisé de smartphones (positionnés sur palette + convoyeur), 30 tél/h annoncés, taillé pour 5 000/mois.
#Backforum2026
On ne peut désormais plus mesurer la performance d'une industrie à son niveau d'inverstissemnt brut dans l'outil industriel.
Le retrofitting et la capacité à mettre des machines antiques sur des standard modernes et automatisable ouvre une nouvelle voie !
En interne, on a découvert qu’on payait une VM Windows Server juste pour faire tourner un vieux logiciel.
Le logiciel, acheté en licence perpétuelle, servait à générer des données. Il répondait encore à notre besoin, mais son hébergement coûtait de plus en plus cher.
Passer à la version récente ? Ça impliquait de racheter une mise à jour et d’adapter nos traitements, car les entrées et les sorties avaient changé.
On a utilisé @reatools, Reverse Engineer Anything, qui permet aux agents d’analyser un logiciel à partir de ses fichiers et de son comportement, sans disposer du code source de l’éditeur.
On s’en est servi pour comprendre son fonctionnement, puis on a réécrit en Rust les fonctions dont on avait réellement besoin, en laissant de côté les options inutiles.
Résultat : un outil plus performant, compatible Linux, et plus besoin de conserver la VM Windows.
Ça ne veut pas dire qu’on remplace n’importe quel logiciel en un prompt. La réécriture demande du travail, et sa maintenance nous revient désormais.
Mais pour un outil ancien, avec un besoin précis qui a peu évolué, on peut désormais envisager autre chose que payer la mise à jour ou conserver l’ancien environnement.
Et vous, vous avez déjà tenté le reverse engineering sur un de vos outils ?
Imaginez la PME industrielle avec une Machine numérique encore d'actualité, mais le PC qui la commande qui est conservé comme une relique, sous Windows 98, déconnectée du réseau et encore branchée en port // ou port série.
L'opportunité de l'IA pour le reverse c'est ...
Benjamin Carlu retweeted
story time! 🐉
this is the tale of a lazily crafted one-shot cron job prompt that resulted in autonomous solutions for uncracked codebreaking challenges, more efficient ways of multiplying matrices, and a new computer-verified bound on a number theory problem that's been open since 1932.
so last week, i had a $200 claude account sitting around that had just gotten a full weekly reset. i hate wasting tokens.
the labs have been knocking out unsolved problems left and right lately, and i caught myself thinking… why not give it a shot?
so i sent claude this prompt, typos and all:
"can you wraite a promtp for a cron job that can run every day thajt will try to find solutions to unsolved ciphers or transltions or math problems or theormes or things of that nature!! every day a new attempt as hard as possible all day without giving ujp and with maximum ceraitvityy, resourcesleflses, andpersticense! dont worry about token spend! and dont forget a bit all caps lots of emojis celebration to notify the uers if we get any intersting or sucsfful confirmd reulsts!!"
yes, admittedly not my best work 😆
but Opus-5.5 ran with the ball and turned that one sloppy sentence into "THE DAILY ORACLE 🔮"
it's a swarm of Fable + Opus agents that clocks in every morning at 4:20 (obviously), builds and maintains its own hit list of well over a hundred of humanity's unsolved problems, and then goes full send on a handful of them every shift. ciphers nobody has broken, scripts nobody can read, conjectures nobody has proven, record tables nobody has beaten.
and there's one rule above all the others: nothing counts until skeptic agents, each starting from a fresh context and writing their own code, rebuild the result from scratch and sign off on it. if any of them can't reproduce it, can't confirm it's new, or thinks we stretched the definition of "solved," it doesn't count.
day 1, the legion picked its own target: J.-F. Bouchaudy's cipher-machine challenges. these are simulations of real vintage machines (Hebern rotor machines, the Kryha, Lorenz, SIGABA), with problems that had been sitting on his solver tables with no solver for months or years.
on the morning of day 2, i was half asleep when my laptop suddenly says, in a robot voice:
"Breakthrough. The Daily Oracle has a confirmed solution."
👁️👄👁️
i was startled.
then the ALL CAPS emoji flood hits my screen. Hebern 5-rotor Problem 8 🔓 then Kryha v2 Problem 5 🔓
i emailed the author, Jean-François Bouchaudy, a French cryptography enthusiast who builds these machine simulators and challenges as a labor of love (he told me he started out programming on punch cards 🥹). he checked both solutions and put my name on his solver tables as the first and only solver 🫡
for context: his tables are a who's who of serious classical codebreakers. they'd cleared the sibling problems on these same machines, but nobody had cracked these two. in his words:
"two of my most complex problems—ones that no other expert had managed to solve… I knew AI would eventually be applied to classical cryptography, but I thought I would have to wait years to see it happen."
he ended his email with: "I offer my congratulations in the Japanese manner: with a deep, respectful bow." 🙇 honestly one of the most wholesome emails i've ever received
and then, over the next few days, more started landing 🧮
📐 graph theory: 7 explicit graphs bigger than the current entries in the degree-diameter table, which asks how big a network can get when every node has limited connections and every pair is only a few hops apart. the biggest jump is 13,365 vertices vs the table's 11,785, a +13.4% improvement.
🔢 number theory: Lehmer's totient problem has been open since 1932. we pushed the bound so that any counterexample now has to be bigger than 10^50. the previous certified bound was 10^26. the problem itself is still open, but the lower bound just jumped 24 orders of magnitude.
⚡ matrix multiplication: this is the operation underneath basically all of modern AI compute. the legion found schemes that use fewer multiplications than the public catalogues we checked for several matrix shapes, like ⟨15,16,16⟩ in 2,180 multiplications vs the best known 2,223. these build on LITA's square schemes, and we credit them by name.
📡 coding theory: 30 error-correcting codes bigger than the best known entries in A. E. Brouwer's tables.
🛡️ AI safety benchmarks: we found counterexamples for 2 neural-network verification instances from VNN-COMP 2026 that no participating tool resolved within the competition time limit, and pushed a defended RobustBench model below its listed robustness score. small dents, but real ones.
the bloopers are part of the story too:
— at one point, some agents snuck past a website's bot filter to check a record table. we retracted every result that depended on it. no evasion, no celebration.
— two of our records got beaten by a human contributor before we could even publish them. the frontier moves FAST.
now as is customary around here, time to share the magic!
so… without further ado…
Benjamin Carlu retweeted
[🇫🇷 version FR 👇] Back on the ground, back home in Europe, and welcomed by family, friends, colleagues, journalists and so many people here in Cologne. What a way to come home! 🫶 Thank you to everyone who was there, and to all of you who liked and shared my posts throughout the mission. You’ve helped shine a light on human spaceflight and what it can bring to life here on Earth.
It took countless people to make this mission possible and successful. But just as importantly, together we made it a joyful one. Rockets, spacecraft and space stations may be extraordinary pieces of technology, but spaceflight is, above all, a human adventure. And it is so much better when that adventure is filled with kindness, positivity and good vibes!
Many thanks as well to the French Air and Space Force for bringing me to Cologne. My 18 years of service taught me so much and played an important part in the journey that led me to become an astronaut. The moment I stepped aboard the plane, I felt at home, surrounded by family, my aviator brothers and sisters.
And now, first things first: getting my “Earth legs” and “Earth balance” back! 🌍
📸 @esa – S. Corvaja (1, 2 & 4), ESA – B. Bailleul (3 & 5)
De retour sur Terre et de retour chez moi en Europe, accueillie par tant de personnes ici à Cologne. Quel retour ! 🫶 Merci à toutes celles et ceux qui étaient là, mais aussi à vous tous qui avez aimé et partagé mes publications tout au long de la mission. Vous avez contribué à mettre en lumière les vols habités et tout ce qu’ils peuvent apporter à la vie sur Terre.
La réussite de cette mission a été rendue possible par le travail et l’implication d’innombrables personnes. Mais tout aussi important : ensemble, nous en avons fait une aventure joyeuse. Les lanceurs, les capsules et les stations spatiales sont d’incroyables exemples de technologie, mais le vol spatial est avant tout une aventure humaine. Et avec de la bienveillance, de la positivité et des good vibes, l’aventure n’en est que plus belle !
Un grand merci également à l’@Armee_de_lair pour m’avoir ramenée à Cologne. Mes 18 années de service m’ont énormément appris et ont joué un rôle important dans le parcours qui m’a menée jusqu’au métier d’astronaute. Dès que je suis montée à bord de l’avion, je me suis sentie chez moi, entourée de ma famille – mes frères et sœurs aviateurs.
Et maintenant, une priorité : retrouver mes jambes et mon équilibre de Terrienne… 🌍
#εpsilon • @esaspaceflight • @CNES
Benjamin Carlu retweeted
Replying to @Soph_astro
@Soph_astro is coming home! 🌍
Watch live as Sophie and her crewmates undock from the @Space_Station today 7 October at around 14:05 CEST, beginning their journey back to Earth.
🔗esa.int/Science_Exploration/…
Benjamin Carlu retweeted
Meet Mistral Large 4, aka Le Chonk.
• 1T parameters, natively multimodal. 49B active.
It is the best open weights model from US or Europe on aggregated benchmarks.
• State-of-the-art on critical workloads, including cyber defense, manufacturing and finance and it surpasses closed frontier models on visual grounding.
• Forged in Europe end-to-end and is deployable from Europe via our own Mistral Cloud infrastructure.
• Available to all via API today. Working with cybersecurity partners privately.
Open weights release end of October.
🤖 Made with AI
Benjamin Carlu retweeted
Ben Affleck (Hollywood star & Artists Equity CEO) talks about how he fine-tunes open video models by unfreezing weights and trained only the last cinematic layer so a film crew can hit real production standards.
for context, Ben Affleck founded InterPositive in 2022, a 16-person AI shop for film post and Netflix bought it in March 2026 for $587 mn in cash.
He needed that model because public video models were trained on his peers' films, and he did not think that was a real business. So InterPositive raised money, shot its own dataset for 8 months on a controlled stage, and used it only as late-stage training.
Each new film then trains a private model on its own dailies, so the production keeps the footage and the learning. That is the product Netflix paid $587 million for.
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From "Bloomberg Live" YouTube channel, (link in comment)
Benjamin Carlu retweeted
Faites comme Clément : rejoignez Le Lab X.
Depuis mars 2026, la communauté grandit tous les mois autour d’un principe assez simple : partager ce qu’on builde, ce qu’on essaie d’apprendre, ce qui marche et ce qui ne marche pas sur le terrain.
C’est gratuit et ouvert à tous les profils.
Les échanges continuent sur Telegram, mais on a maintenant aussi notre propre espace membre sur notre site pour organiser et conserver toute cette matière vivante produite par la communauté.
Tout est sur le-Lab-X.com pour nous rejoindre.
J’y reviendrai plus en détail dans les prochains jours :)
Replying to @LiorNsnd
Il y a aussi la communauté de @iamsupersocks sur Telegram que je recommande à 100%
Join the journey!
A few days ago I offered my book for free here.
For some reason I thought I was on LinkedIn and asked everyone to comment so I could send the PDF manually 😅
Bad idea.
So: the book is now free on Substack, in English and French.
And I’ll keep adding new chapters there.
Subscribe and you’ll get the PDF in the welcome email:
iconic.substack.com/
Fingers crossed this one stays up 🤞


























