You Haven't Seen This BIP101 Block #374611

[dgenr8]

A BIP 101 block was mined by multipool within 1 minute of

Tue, 15 Sep 2015 08:02:59 GMT

It was orphaned by a BTCChina block that was RECEIVED by dispersed nodes within 2 seconds of

Tue, 15 Sep 2015 08:08:57 GMT

... at least 5 minutes later. That's a long time for a block to exist without being built on.

It is unclear why this block propagated almost not at all. Adam at multipool reports that he was connected to 8 remote nodes at the time (but no longer has their IPs). I received the block directly from him via email.


{
"hash" : "000000000000000008373c8cd8caf49c31ace7162f3387df65e488118fbba986",
"confirmations" : -1,
"size" : 998204,
"height" : 374611,
"version" : 536870919,
"merkleroot" : "4f983224f4068f2143829545c6b6d81e842b755601aad490bf966da31c68cfee",
"tx" : [
...
],
"time" : 1442304179,
"nonce" : 3716687465,
"bits" : "18134dc1",
"difficulty" : 56957648455.01000977,
"chainwork" : "0000000000000000000000000000000000000000000a303968679781c6d4dc04",
"previousblockhash" : "00000000000000000c17bc292748ace6fd6861002a706a2a80586fba57b01690"
}

Full block hex here.

 

[solex]

Blockchain.info is very well connected and lists the orphans it sees.
e.g. 374564.
But there is no 2nd entry for 374611

https://blockchain.info/blocks/1442279096605

So it seems the multipool one did not propagate far.

 

[Georg Engelmann]

I informed multipool that they can add one of my nodes to their config (both of my nodes are always connected to 25+ nodes)