Does は mean 'at least' in this sentence?

Question

I can't catch the grammar of the following sentence

今なら嫉妬で100人は殺{ヤ}れますよ。

In the previous text there was no reference to 100人. What is the function of は here? Is it a contrastive marker used instead of を?

What is the meaning of the sentence?

Now I am so jealous that I am able to kill at least 100 men.

Am I right?

From manga. A girl kissed the cat. And one of the manga characters, who saw the scene, delivers this phrase. — Tabibito, Nov 24 '15 at 20:28
@Tabibito やる can mean a lot of things; one of its meanings is "to kill", and when it means that, it may be written (kind of slangily) as 殺る【やる】. 殺れる【やれる】, then, is indeed just the potential form of that: "can kill". — senshin, Nov 24 '15 at 22:44

score 12 · Accepted Answer · answered Nov 25 '15 at 01:54

You're correct, this kind of は means "at least".

Of course number + は does not mean "at least" in sentences like this:

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