Commented Unassigned: Error when CommonName is number [51]

I input the cmdlet:
PS C:\Users\Administrator> Get-CertificationAuthority -Name testpcca | Get-IssuedRequest -Filter "CommonName -eq 10000" | Revoke-Certificate -Reason "CeaseOfOperation"
It apear error:
警告: Specified pattern 'CommonName -eq 10000' is not valid!
Who can help with this error?
Comments: Thankyou,I'll try it.