[My "First" Prime ! What's Yours ?]

I was like you OP, got Frost Prime through the twitch giveaway but the first prime I farmed was Saryn Prime when I heard she was gonna be vaulted. Took me 3 days of non-stop relic and fissure farming to get her chassis. And I remember when I started I didn't really know how relics worked and passed on Saryn Prime chassis for a forma blueprint FML.