Let's add up the KNOWN lost bitcoins

[cypherdoc]

18,907.12000001
+               0.02
--------------------
18,907.14000001

Another 365.18 gone forever...  http://forum.bitcoin.org/index.php?topic=18371.msg232955#msg232955

18,907.12000001
+  365.18000000
----------------
19,272.30000001

Surprisingly, it's now been recovered!
http://forum.bitcoin.org/index.php?topic=18371.msg342784#msg342784

19,272.30000001
-   365.18000000
----------------
18,907.12000001

18,907.12000001
+      1.12
18,908.24000001

don't ask.

[Jered Kenna (TradeHill)]

19,272.30000001
-   365.18000000
----------------
18,907.12000001

One of these days ... someone will hit the JACKPOT!

For another thread, it might be cool to try and calculate the biggest JACKPOT someone is likely to hit over the next ten years.

Cheers,
Adam    

[lettucebee]

I'm assuming you are not including THEFT in your definition of "lost"?

[Alex Beckenham]

I'm assuming you are not including THEFT in your definition of "lost"?

Nope, stolen coins are still in circulation.

[teflone]

And the worlds most boring thread award goes to OP!

[SgtSpike]

And the worlds most boring thread award goes to OP!

Awww...  I thought it was rather interesting myself...

[dooglus]

18,907.12000001
+      1.12
18,908.24000001

don't ask.

http://blockexplorer.com/address/1BitcoinEaterAddressDontSendf59kuE

18,908.24000001
+      0.0211
18,908.26110001

[gmaxwell]

So, for SCIENCE (er, well, wallet code testing), I modified a bitcoin client to short-circuit IsMine, IsConfirmed, and the coinbase maturity check. Then I rescaned the blockchain:

    "balance" : 6848199.98999999,
    "blocks" : 136965,

50*136965 - 6848199.98999999 = 50.01000001

This isn't the same as lost coins— e.g. my client thinks it can spend the 1BitcoinEater coins. This is a count of coins that don't exist, at least as far as the wallet code is concerned.

The 1e-8 is the coin midnightmagic opted not to generate in tribute to Satoshi. The 0.01 is the fee midnightmagic accidentally destroyed in the process. (http://blockexplorer.com/block/0000000000004c78956f8643262f3622acf22486b120421f893c0553702ba7b5)

I'm _assuming_ the 50 is the duplicate coinbase from http://blockexplorer.com/block/00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec.

These coins aren't even recoverable with a magical ECC cracking and/or hash colliding machine, but at least as far as the wallet code is concerned they're the only ones.

[Rassah]

18,908.24000001
+      0.0211
18,908.26110001

2BTC lost to Bitcoin-Android
http://blockexplorer.com/address/1DWwhv9Kg3SE9GBX7Kk9A11nw3B3MUBe2t

18,908.26110001
+      2.00
18910.26110001

[Rassah]

I wonder if Bitomat will be adding their 17,000BTC to this list?

[spruce]

A friend today told me he just deleted his bitcoin wallet. That included 0.025 BTC I had sent him to play around with. He's not very computer-savvy.

[Sukrim]

I wonder if Bitomat will be adding their 17,000BTC to this list?

They didn't state any amount of bitcoins being lost --> 17000BTC is the price if you want to buy the page there

[SgtSpike]

Any recently lost forever coins?

Also, bitomat lost 17k BTC... is that confirmed for certain?  Are those addresses public so we can confirm they have not moved yet?

[SgtSpike]

Yeah, I know it's an old thread, but wanted to update it with the latest.

So, 2600+ confirmed coins lost by MtGox.

18910.26110001
+2600
21510.26110001

[cypherdoc]

i've never forgot this thread.  good to see it up again.

[SgtSpike]

Found this on the bitomat situation.  I'll go ahead and add those coins for now.
http://www.reddit.com/r/Bitcoin/comments/j4t58/3rd_largest_bitcoin_exchange_has_lost_its/

21510.26110001
17000.00000000
38510.26110001

Only 20,961,490 coins left.  Better start buying!

[TravisE]

What about these?
https://bitcointalk.org/index.php?topic=67158.0

Anyone know how many such malformed transactions there are?

[SgtSpike]

What about these?
https://bitcointalk.org/index.php?topic=67158.0

Anyone know how many such malformed transactions there are?

I'd say that's legitimate as lost coins.  Not sure how you'd go about finding similar lost coins though.

38510.26110001
+     0.00224733
38510.26334734

[ThiagoCMC]

2.5BTC lost to Bitcoin-Android of a friend of mine... I sent to him and he lost due to software fail...

Following that rate, when all 21.000.000 will be lost?!

I mean, what is the actual "lost rate" of Bitcoins per day since its genesis?

[SgtSpike]

2.5BTC lost to Bitcoin-Android of a friend of mine... I sent to him and he lost due to software fail...

Following that rate, when all 21.000.000 will be lost?!

I mean, what is the actual "lost rate" of Bitcoins per day since its genesis?

Ok...

38510.26334734
+    2.50000000
38512.76334734

Bitcoin's been going for what, 3 years now?  But really only used heavily for 2.  So you can assume around 19k lost coins per year, so far...

Of course, there will never be "no more bitcoins".  Losses are more likely to be expressed as a percentage of remaining coins, which would never reach 0.  19k out of 7M coins is about 0.27%.  So a quarter of a percent of remaining coins per year.  Who knows how that might change if Bitcoin becomes mainstream.  On the one hand, more people touching coins = more lost coins.  On the other hand, more people touching coins = more value per coin = fewer coins per person being touched.  It might just even itself out.