520 confirmations are required for PoW and PoS blocks.
how many blocks before the coin matures or confirmations needed?
I found this block but it's still showing at immature - Block # 126361
root@ns500637:/usr/local/bin# novacoind listtransactions
[
{
"account" : "",
"category" : "immature",
"amount" : 7.84000000,
"confirmations" : 403,
"generated" : true,
"blockhash" : "000000000032a7bef3170a600224ae843b697d657d9690fac26b0fdfb2c83732",
"blockindex" : 0,
"blocktime" : 1411921659,
"txid" : "f991be375f8f18b784823d320eec07568b8cd1e553725424552a981a24e8de6e",
"time" : 1411921659,
"timereceived" : 1411921697
},