Соколик, а повторяющаяся фраза "отказано в доступе" не смущает?
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To the question of windows10 - Windows users are born to suffer
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Try admin privileges, if all required apps are installed, path variable. And it makes sense to compile proggie by yourself.
You can specify starting key in HEX, not WIF key.
In linux there's a nice util bc.
As puzzle55 is already found, going for p56.
echo 'ibase=10; obase=16; 2^56 ' | bc
100000000000000
[go@russian /]# echo 'ibase=10; obase=16; 2^55 ' | bc
80000000000000
puzzle 56 is between
80000000000000 and 100000000000000 (that's HEX!)
vanitygen searches DOWN. So you can start from 100000000000000, but actually I've checked several days from the very end.
It is better to pick some random number, like 65. We'll go to 65% of p56 range. That is
echo 'ibase=10; (2^55) + (2^55*65/100) ' | bc
59447515081290547 (in decimal)
and
echo 'ibase=10; obase=16; (2^55) + (2^55*65/100) ' | bc
D3333333333333 (in HEX)