Nov 2, 2024 21:50
@Cadence Also with 15KW/h of energy per Kg of gasoil, this means 10¢ per Kw/h : still cheaper than your floor prices.s
Nov 2, 2024 21:40
@Cadence please show some source for wheat trading price : that doesn’t seems to be current prices when I googled for it… At least in Europe.
Nov 2, 2024 20:45
@JBH I do care about quantities : the idea is to have carbohydrates that are far cheaper than current food. carbohydrates that aren’t outright non toxic.
Nov 2, 2024 20:45
@AlexP yet gasoline or even gasoil despite being refined is cheaper than flour…
Nov 2, 2024 20:45
@Cadence in real world, continue to be as poor as I am and you end up catching scurvy (in theory). Also a set of vitamin pills containing all the daily supply of all possible vitamins and selenium costs 4€ per months (but most of my peers in my scenario would don t buy and only use flour even if it send them to the hospital). Of course, eating healthy becoming an idea of the far left is in part responsible of the medical torture of my grandfather but with reasearch continuing on selecting varieties having higher productivity at the cost of less nutrients/vitamins give look to how this can end.
Nov 2, 2024 20:45
@AlexP how does this translate to energy? 1Liters of oil or liquified natural gas doesn t worth 1 liter of flour or rice. Also understand a part of fossil fuel going into agriculture mechanisation.
Nov 2, 2024 20:45
@Cadence I m not thinking personally not having a healthy diet is good. I m saying person promoting heathy diet tend to be seen as starvation promoters in my country. Though personally by being broke and food charities being mostly broke too, I have to resort to flour soup.
Nov 2, 2024 20:45
My own grandfather : stop wasting money and worrying about cancer or diabete, you know the doctors, they know how to cure everything. Though that didn’t worked out for him. For reference : 1Kg of flour providing 3700calories cost 59¢ at hyperdiscount stores. if you lack money, you don’t back it into bread as it’s a food energy destructive process but you blend it with water and have to drink the flour soup uncooked.
 
May 14, 2024 16:08
@fgrieu je veut dire que chaque étage du pipiline doivent pouvoir traiter une boucle séparée et donc de manière indépendante de cqui se passe dans les autres étages
May 14, 2024 14:29
@fgrieu Ce que je pensais plutôt faire, c est organiser le système de manière à ce que chaque entrée dqns le pipeline puisse être présenté comme une unité de traitement distinct pour l ordinateur (comme si s en était une).
May 14, 2024 07:46
@fgrieu par rapport à la réponse, la latence est coûteuse sur un fpga en terme de communication. L intégralité du calcul doit être fait dessus.
May 13, 2024 21:23
@fgrieu je viens de lire ça secp256k1 was constructed in a special non-random way which allows for especially efficient computation. As a result, it is often more than 30% faster than other curves if the implementation is sufficiently optimized Ça ne change rien parce que c est que pour les multiplications scalaires?
May 8, 2024 23:43
@fgrieu et vu que la cordonnées y n’est jamais nécessaire dans les résultats finaux, n’y a‑t‑il pas un moyen de s’en débarrasser des étapes intermédiaire ?
May 8, 2024 10:07
@fgrieu Question stupide… Où est l’opération de l’inverse modulaire dans la formule que tu m’as donnée ?
May 7, 2024 20:40
@fgrieu Cette formule ce n’est pas celle de Weistrass ? Secp256k1 est une courbe de kobllitz… Et pourquoi dans les programmes qui calculent les coordonées avec cette formules utilisent une composante z sur les points en plus de x et y ?
May 5, 2024 22:33
@fgrieu Il me semble que calculer mod P pour les résultats intermédiaires ajoute des opération non ?
May 5, 2024 16:18
@fgrieu Question stupide : concernant le lien secg.org/sec1-v2.pdf#subsubsection.2.2.1 c’est chaque soustraction/multiplication/division qui est modulaire ou seulement lambda/x/y ? Je veux dire par exemple x=((λ²%P − x1)%P − x2)%P ou x=(λ² − x1 − x2)%P ?
May 5, 2024 15:18
@fgrieu Non, je veuxx dire la valeur de p, c’est la même valeur que le point G ?
May 5, 2024 13:55
@fgrieu Mod p… p C’est le même G de secp256k1 ?
May 5, 2024 08:52
@fgrieu I just noticed only compressed keys are used. Since I suppose additions requires the full key, is it still slower than scalar multiplication which would compute only the x part? Also given the x part of the private key being known which would allow to perform pre computations.
 

 mempool

A place to chat about the Bitcoin Stackexchange, Bitcoin in ge...
May 8, 2024 22:25
Hi, is there anyone living or going to Denver the next week ? I’d like to ask something to somewhat who will perform a conference indirectly linked to Bitcoin there…
Apr 27, 2024 15:22
@HannahVernon Yes. I know. Hence why I only talk about it in this chat.
Apr 27, 2024 11:10
0
Q: Advanced open‐source fpga for Bitcoin minning design ? (shift register design ; double pipelining and factor 2 unfolding transformation)

user2284570I know ᴀꜱɪᴄs are more efficient but I’d like to make the customizations myself and be able to reconfigure to other mining algorithms as the target cryptocurrency uses sha256 for proof of work but in a way that makes Bitcoin miners incompatible (sha256 one time from a single 32bytes input instead ...

Apr 27, 2024 11:10
I suppose it would be off‑topic on this site, so any help ? softwarerecs.stackexchange.com/q/90397
 
Mar 16, 2024 12:28
In the end the number of bits to factor is determined by the price (turns out even for fact0rn It’s a no profit activity as miners spend on electricity almost match the sell value of the blockreward). The correct way to measure the electricity spent on a Bitcoin block isn’t in € but in Bitcoins : then the cost is 6.5Bitcoins minus 0.5% in electricity to create a Bitcoin block.
Mar 16, 2024 12:18
@fgrieu-modelectiontime The 10 minutes blocktime is maintained only by the number of bits to factor : if the blocktime decrease then the number of bits to factor increases et vis versa…
Mar 16, 2024 12:15
@fgrieu-modelectiontime Ou plus exactement, la valeur de B peut être prédite si tu as toi même la valeur de A. Mais en ne soumettant pas ta solution pour A, tu risque d’avoir quelqu’un qui en propose une autre avant…
Mar 16, 2024 12:12
@fgrieu-modelectiontime Il donne des détails plus technique sur le pourquoi des failles…
Mar 16, 2024 12:11
@fgrieu-modelectiontime That’s correct. If you continue, you create an uncle.
Mar 15, 2024 22:52
rekt.news avant l’heure…
Mar 15, 2024 22:49
On peut parler de la taille ilimité des blocks (réseau down après qu’un pirate génère un blocks de plusieurs Go) et ensuite d’aller la limiter bêtement a 1 seul Mo, ou au pirate q45 s’est attribué avec succès 2<sup>64</sup> Satoshis simplement en faisant simplement 2 addition d’entiers négatif afin de faire croire que la transaction ne dépensait aucun Bticoin.
Mar 15, 2024 22:47
: en fait, du temps où il était en charge du dévelopment il y eu beacoup d’attaques ayant généré des trilards de Bitcoin (Satoshi Nakamato étant considéré comme un maître, sa manière de régler les problèmes faisant parfois perdre des Bitcoin échangés légitement ne faisait pas débat).
Mar 15, 2024 22:44
@fgrieu-modelectiontime Satoshi Nakamoto was a great programmer for creating simple ɢᴜɪs in qt, but a very poor programmer in networking and computer security and didn’t even understand the concept ɪᴇᴇ float (which makes Bitcoin and thus fact0rn only understanding satoshis internally). Il y a un myth queue Bitcoin n’a jamais eu de hard fork
Mar 15, 2024 22:37
@fgrieu-modelectiontime : in details, you need to find a solution matching the current merkleroot. And the merkleroot change each time there’s a new transaction so at each block. what you seem to describe is uncles blocks. Ethereum provided a solution to make mining on uncles profitable but Bitcoin and thus it’s forks never saw the problem of uncles blocks will exists : so it’s chosen block is the 1 which is chosen by at least 51% of miners (with uncle blocks discarded reception in cases like Bitcoin Cash).
Mar 14, 2024 12:51
@fgrieu-modelectiontime Tout simplement parce que le nombre à factoriser change à chaque block !
Mar 12, 2024 18:33
@fgrieu-modelectiontime Il me semble qu’il permet en réalité d’éliminer les facteurs dans une certaines interval (juste que c’est mieux d’élminer les plus petit en premier)
Mar 12, 2024 18:09
@fgrieu-modelectiontime la première étape de l’ecm permet de savoir si il n’y a pas de facteurs sur une intervale de la courbe, donc un facteur compris dans une certaine intervalle…
Mar 12, 2024 17:50
@fgrieu-modelectiontime It’s easy to remove factors with small divisors. But the most straightforward problem would knowing if a prime factor exists within a specific range (or more exactly bitlength)…
Mar 12, 2024 17:47
@fgrieu-modelectiontime On my personal side, I’ve big fine to pay, so I never mine… the person who asked a question about in on the other forum faced rebuke and got his question deleted…
Mar 12, 2024 17:42
Not a good idea…
Mar 12, 2024 17:42
@fgrieu-modelectiontime Besides the instead of 1 having 1 more competitor I’ll run the answer instead of telling it, most peoples who know tell they refuse to do anything related to cryptocurrencies.
Mar 12, 2024 17:38
alpertron.com.ar/ECM.HTM seems to launch sieving only when it finds that a factor is in a specific bitlength…
Mar 12, 2024 17:19
@fgrieu-modelectiontime If only 383 bits was to be factored, the block time would be less or the difficulty would be alot of higher…
Mar 12, 2024 17:17
@fgrieu-modelectiontime That would explain 383 bits ? Because there's need to be many times more a number to hash ?
Mar 12, 2024 17:12
@fgrieu-modelectiontime Ok. I suppose as a result there’s no way to check if a random number is a semiprime besides basic checks ?
Mar 12, 2024 16:42
@fgrieu-modelectiontime But the miner code behaves the other way : github.com/FACT0RN/factoring#factoring I checked it and it generates a suitable n quickly to spend time factorizing it…
Mar 12, 2024 15:47
@fgrieu-modelectiontime You insisted. So I gave it. If you could rewrite the question, it would be great. (then remove those comments)
Mar 12, 2024 15:04
@fgrieu-modelectiontime I would vote if you rewrite the question better without telling what it is.
Mar 12, 2024 15:03
@fgrieu-modelectiontime the truth would chase away the person who want/can to respond, as it did with cado-nfs folks on the mersenneforum. Better to not tell what it’s about.