(adsbygoogle = window.adsbygoogle || []).push({}); i just wanted to know . When you prestige for the second tie do you lose your prestige challenges or do they stay after you prestiged

All the killstreak kills stay.
You only lose the ones at the very bottom, like knife, silencer, stun and flash veterans.

oh ok thanks ive already got gold for silencer and knife anyway so....

idk why the bottom ones reset i guess it was a glitch or something.