What's the USER_AGENT googlebot using?

I need that to track how frequent that Google crawls to my sites.
Thanks you all.

 

Googlebot user_agent

Googlebot/2.1 (+http://www.google.com/bot.html)

 

thanks.

btw, what's this Mediapartners-Google/2.1

 

I got Mediapartners-Google when I put adsense on some sites.

Last week I have been seeing this on 2-3 sites:
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

I has crawled quite a lot of pages too. Is it google or some rogue bot spoofing it's agent?

 

Yesterday it was on my website with the user_agent

Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
ipadress 66.249.65.204

a nslookup gave me

Name: crawl-66-249-65-204.googlebot.com
Address: 66.249.65.204

I suppose it's a googlebot

 

Mediapartner is the AdSense bot. Not an indexing bot but a bot that determines the subject it should spawn ads for.

 

Good to know that it's a google bot (the one with mozilla user-agent), it has crawled about 1k pages so far. I hope they get indexed too, only 50 so far...