What is the tense of "Christ is risen"?

The Bard speaks:

From sydney.edu.au/engineering/it/~matty/Shakespeare/nsearch.cgi
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The following words appeared in your search: is:9414 risen:5

Your search produced results in the following works:
Coriolanus

Coriolanus
Act 1, Scene 1

First Citizen If I must not, I need not be barren of accusations;
he hath faults, with surplus, to tire in repetition.

[Shouts within]

What shouts are these? The other side o' the city
is risen: why stay we prating here? to the Capitol

vs.
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