Satanic Murderer Miranda Barbour -- 'I've Killed LESS THAN 100'

The Satan-worshipping woman who just admitted to more than 22 murders actually suggested it could be several times more than that number ... confessing it's "less than 100" ... and her murderous alter ego was named "Super Miranda."

Miranda Barbour is in a Pennsylvania jail after allegedly murdering a man she located in a sex ad on Craigslist. She dropped a bombshell in an interview with Francis Scarcella of the The Daily Item ... something that was not in his article.

Scarcella tells TMZ, he pressed Barbour on the number of people she killed, after she said, "When I hit 22, I stopped counting." As Scarcella pushed her, she blurted out, "It's less than 100." She would not be more specific.

Scarcella says when Barbour was about to kill, she claimed she changed personas, becoming "Super Miranda."

Barbour told Scarcella the knife she used to brutally murder the Craigslist victim had murderous notches ... she said she had used the same knife before ... because it's one of her favorites.

And Barbour told Scarcella ... she only killed bad people -- people who abused children and people who owed money.

And Barbour says she felt satanism controlled what was inside of her.