there used to be projects like mangocoinz that portrayed themselfs as cellphone minable
https://bitcointalk.org/index.php?topic=902788.0

But if i understood the concept correctly (i never took the time to read the whitepaper tough), it was a (pre?)mined that was distributed to users when they ran the mangocoinz app on their cellphone while exercising. This makes them not cellphone minable, but you sstill needed a cellphone to receive mangocoinz.

As far as i know, there are no pow algo's that are designed to give an edge to cellphone cpu's or gpu's.

I'm happily using both a trezor and a ledger nano S. I gave my ledger HW.1 to my daughter.

Can you be sure the manufacturer did not tamper with the initilisation workflow so they only create pre-generated seed phrases during initialisation? No, there is no 100% guarantee if you use the device out-of-the box and do not check the sourcecode, compile and verify everything yourself . However, trezor's design and firmware is completely open, they both use bitcoin standards, so you can easiliy check wether or not the seed you entered corresponds with the deposit addresses generated by your device. You could even open up your hardware wallet and check if all components are correct, you can verify the firmware,...

Like i said, the only thing they could tamper with, is the initialisation of their wallet... But you could potentially check the sourcecode and compile everything yourself, or roll a dice to create your own seed phrase. So, if they tampered with the procedure, i guess sooner or later somebody would find out and destroy their business.

As a matter of fact, did you check your other wallet's sourcecode and compiled everything yourself on a clean, potentially airgapped system? Did you check all signatures of your wallet before running it? In case you create a paper wallet, did you check the RNG they used???

I don't know many people that use a dice and an airgapped PC to create their private keys, so sooner or later you're going to have to trust somebody (wether it's the community, the reviewers, the manufacturer,...)

If not, your other wallets are less safe than your hardware wallet.

I guess it'll depend on wether or not you saved the session token. If you have the session token, you should be able to contact chipmixer and ask them to extend your session, and pick it back up when the DDos attack is finished.
Personally, i'd never deposit a single satoshi before saving the session token. In the pre-chipmixer days, when using bitmixer.io, the first thing i did before depositing anything was saving their letter of guarantee, which is the closes equivalent to saving the session token (AFAIK)

Good luck

I did have one piece of advise tough: bring your asking price in BTC down towards the asking price in FIAT.
On that website you posted, you're asking 250.000€, while on this forum you ask 75BTC (~= 303.500€). Basically, you're asking a 53.500 euro premium for paying in bitcoin... It would make a lot more sense for an interested buyer to exchange their BTC to FIAT and then make you an offer using this FIAT.

Or am i missing something here.

You got it right
that's actually a pretty good way of explaining difficulty to new members, i might have to point them towards this thread the next time i'm about to explain how difficulty works.

The only slight "mistake" is the fact that you cannot use the term "2 weeks later"... The difficulty doesn't adjust every 2 weeks, it adjusts every 2016 blocks. So in your story, the number of stones gets adjusted every 2016th trip the people make. If there are 2 people that carry 2 stones, it takes them ~10 minutes/trip (sometimes longer, sometimes faster, but the average trip time is ~10 minutes), so 2016 trips are ~2weeks.

If one breaks his leg, and the other person has to carry the two stones (time between blocks ~20minutes), it *might* take 4 weeks before the difficulty gets adjusted to one stone (depending if the other one breaks his legs at the very beginning of the period, or near the end of the 2016 trip period)

The OP was asking questions about electrum and electrum-ltc, not about core. Electrum is an SPV wallet, not a full node implementation, it doesn't listen to ports on your local machine, hence you do not have to configure ports differently.
Since electrum is not a full node implementation, it does not receive unconfirmed transactions, nor does it verify new blocks... This also results in the fact you cannot request a block template from an electrum wallet, so you can not use it to mine (sure, you can use an address generated by electrum to fund as coinbase transaction, but that's about it, it is not a mining node in any sense of the word).
Also, electrum is written in python, not in java

Sorry, what?
I have no idear what you're trying to say...

expedise which process? mining? A common CPU has little or nothing to do with bitcoin mining nowadays. A profitable miner HAS to use an ASIC (a very recent one for that matter). The only cpu that is involved in mining is the cpu of the controller.

the most important factor in being a profitable miner is not network support, it's the power rate. If you pay more than 10 cent/Kwu, you don't even have to think about anything else. It'll be close to impossible to mine profitably. Altough the controller has to fetch the block header, the amount of network traffic for a mining operation is minimal. Sure, you need a network connection, sure a low latency, fast connection might give you fewer stale shares, but it's certainly not the most important factor.

I don't know what this user means exactly, but anyway you put it: the risks outweigh the benefits.
Mining BTC with your laptop will make you less than $0.03 (in BTC) a year without incorporating the power and hardware costs (if you pay for power or hardware, you'll mine at a net loss). Altough the risks aren't that big, they still outweigh the potential income of 3 cents/years (with free power and free hardware)

quoted that for you

very simple: it won't get accomplished.
If you read on, you'll see the OP is a potential hacked account, he made a hastly sig campaign with to-good-to-be-true rates, and he didn't even realise that putting an image in your sigspace isn't possible in this forum.

Create a new wallet on each chain, empty out your old wallets on each chain by spending all unspent outputs and funding a new address generated by your new wallet.
Once you're sure that you now have all your funds properly stored on a new wallet whose addresses were not generated before the fork, you can spend your unspent outputs safely on each chain

I actually created a graph to illustrate this the previous time i participated in a discussion about replay protection

yes,

Electrum allows you to export your private keys, so you can import them into the forked coin's wallet after the fork... Do be carefull about a replay attack!

We are in the bitcoin mining subforum!
100Gh/s =~ 0.00002237BTC/day, certainly not 0.0426BTC/day.

@OP: please don't mine bitcoin with a laptop.
https://en.bitcoin.it/wiki/Non-specialized_hardware_comparison

Best case scenario, you'll get 66.6 Mh/s out of your i7. The predicted income at current diff, block reward and btc price is 0.00000572BTC/year, (that's $0.03 for a full year of mining). After you pay the electric bill, you'll defenatly be mining at a loss.

A wallet does not physically hold any bitcoins. If you own 1 bitcoin, it means there is at least one unspent output with a value of 1 BTC from a transaction that funds an address whose private key you posses, that is included in the blockchain (the decentral ledger stored on all node's disks).
When a hard fork occurs, it just means that the old data in the decentral ledger will exist on both the original BTC's ledger (database) and the fork's ledger. This old data contains the transaction whose unspent output can be spent by the owner of the private key in your wallet. It does not matter if this private key is encryped and stored on a hardware wallet, in a wallet file on your local disk, or bip38 encrypted and printed on a piece of paper. All those private keys can be used to create a signature to spend the unspent outputs stored in both ledgers (the original ledger and the one of the fork).

If you put your funds on an online wallet, they have access to your private keys (and a lot of times, you don't have access to your private keys). This means it's up to the exchange to either do nothing, steal your funds or credit your funds. If you hold your own private keys, it's completely up to you what you'll do.

Quoted, but that doesn't look like a valid bitcoin address tough...

I'd always recommend to hold your BTC in a local wallet. You maximise your possibility's and minimise the risks by being the only one in controll of your private keys.

If you have a small amount of BTC, an encrypted desktop wallet like electrum or core on a clean pc is sufficient. If you hold a lot of BTC, i'd recommand a hardware wallet, an airgapped pc or a paper wallet.

I feel the same old discussion coming up... Yes, there are apps out there that are able to do a sha256d hash of a block header while incrementing a nonce...

https://play.google.com/store/apps/details?id=com.justanothertry.bitcoinminer&hl=en
If you start reading the replys, the first reply actually indicating a hashrate was a guy who go ~6kh/s on a "Snapdragon 801". Other hashrates indicated were ~3kh/s, 2.7 kh/s,...

There are 7.600.000.000 people in the world. If they all had a relatively decent cellphone hashing at 6000 h/s (6kh/s), the total world population's hashrate would be 4.560.000.000.000 h/s

One single antminer S9 hashes at 14.000.000.000.000 hashes/second
4.560.000.000.000 / 14.000.000.000.000 = 0.32

This means that every person in the world should have 3 cellphones mining 24/7 with such an app to have the same hashrate as a single antminer S9

So, in conclusion, are there apps that can mine BTC... Theoretically, yes, there are apps that mine bitcoin. It's also possible to write an excel sheet that mines bitcoin, or you can mine bitcoin using pen and paper... However, in reality, the odds are so small i personally think it's better to say such a thing is impossible. If you tell people there are apps that mine bitcoin, it will only inspire them to run such an app, burn a lot of power, burn their phone, get nothing in return. By saying it's impossible, (hopefully) you don't give them crazy idears.

How many private keys did you try to import at once?

all, you don't know which address was funded... So just import all private keys.
You can use notepad++ in column mode to clean up the dump file, or you can execute a macro to create a clean list of private keys.

Just don't try to import more than 50 private keys into an electrum wallet at a time... From experience i know that importing +50 private keys at once might cause the import process to lag.

no problem
Just make sure you always write down the seed phrase. Even if everything goes wrong (which i doubt), as long as you have the seed phrase, you can restore your wallet)