Six digits.

六位数字。

youdao

Using six digits makes a pass code 100 times harder to guess.

六位密码要比四位密码难猜100倍。

youdao

Now key in the password, please. Six digits. Then key it in again to get it confirmed.

请您输入密码，要六位的。然后再输一遍确认。

youdao

To conserve expensive data storage, program date codes were written with six digits, as in 121565, for December 15, 1965.

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