Generated wordlist size is not right?

[strayapanda]

Hi I would love to crack a password of length 8 with a combination of upper/lower/digit and !@#$%^&*?

I did a rough calculation which should be equal to 71^8 = 6.45753531245761 × 10^14.

But this is what hashcat gave me


Session..........: hashcat
Status...........: Running
Hash.Type........: NetNTLMv1-VANILLA / NetNTLMv1+ESS
Hash.Target......: /home/yuri/Desktop/hashes/unsw/unihashes_converted
Time.Started.....: Sun Mar 26 10:32:09 2017 (3 mins, 41 secs)
Time.Estimated...: Tue Apr 18 10:42:25 2017 (23 days, 1 hour)
Input.Mask.......: ?2?2?2?2?2?2?2?2 [8]
Input.Charset....: -1 myowncharset, -2 ?1?l?u?d, -3 Undefined, -4 Undefined
Input.Queue......: 1/1 (100.00%)
Speed.Dev.#1.....: 19780.4 MH/s (63.60ms)
Recovered........: 0/61 (0.00%) Digests, 0/61 (0.00%) Salts
Progress.........: 4387273441280/39390965405991421 (0.01%)
Rejected.........: 0/4387273441280 (0.00%)
Restore.Point....: 13107200/128100283921 (0.01%)
Candidates.#1....: s!v2^S!! -> k1r4wZ!!
HWMon.Dev.#1.....: Temp: 74c Fan: 73% Util: 94% Core:1860MHz Mem:4513MHz Lanes:16

The value 39390965405991421 is way more than i expected.
 

Did I do anything wrong?