2. 2
3. 4
[...]
26. 33554432
27. 67108864
28. 134217728
Maybe you're right, but I doubt it. I've never seen more than 27 in a row, but with over a billion bets at Just-Dice I would be surprised if there wasn't at least a 28 streak at one point. 2^20 is about a million, 2^8 is 128, so it would take about 128 million bets on average to see a 28 loss streak at 50%. And quite a few less at 49.5%.
People keep asking me "what's the longest streak on JD?". I didn't look. It will be a pain in the ass to go through the data and work it out. But if you want to make a little wager on the existence of a 28 loss streak at 49.5%, that would make it worth my time.
So how about it? Promise I won't cheat and look it up ahead of time.
So here's the bet for anyone who wants to take me up on it: Edit4: betting is over - the 50 BTC limit was reached
I bet there has been a streak of 28 or more losses in a row at 49.5% by a single account on JD in the first 1,216,045,813 bets (that's how many there have been up to now). I'll ignore bets at different chances - so if they lost 15 times at 49.5%, then win one at 90%, then lose another 15 at 49.5% that counts as a losing streak of 30 at 49.5% - the 90% bet is ignored.
I don't know how many of the 1216M bets at JD were at 49.5%, but I guess it's around half of them and so I think I have a decent chance of winning this. The offer is open to anyone who wants to take me up. Send your bets to 1CNPpAxC5Si15qcVBQn7jEoXmBKTn7fSqg and if I lose I'll return twice as much to the first sending address of each transaction, satoshidice style. Offer open until exactly 7 days from the time of this post.
Edit: I guess I should set a maximum so I don't bankrupt myself. Once the total reaches 50 BTC I'll return any excess to the sending address. First come, first served, in blockchain order.
Edit2: just to be clear, the player doesn't need to be martingale betting, and the stake doesn't matter at all; losing bets of 0 BTC are still losing bets.
Edit3: I'm talking about sequences of 28 or more bets at 49.5% (after filtering out non-49.5% bets) where the player lost. Bets where the house lost aren't counted as "losing bets" for the purposes of this bet.