Carmarthen's Uefa Cup ambitions all-but ended at the first hurdle as they crashed to a strong SK Brann side, who started with nine full internationals.
Brann Bergen's Robbie Winters proved too good for Carmarthen
Two of those - strikers Robbie Winters and Thorstein Helstad - shared five goals in the first half, ex-Scotland front man Winters bagging a hat-trick.
Kristjan Sigurdsson, Jan Solli and Armann Bjornsson completed the rout in the second half at Richmond Park.
To cap Old Gold's misery, Neil Smothers was sent off for a second yellow card.
The humiliation could have been worse but for a fine display of goalkeeping in adversity from home stopper Neil Thomas.
The result still equalled the worst-ever performance by a Welsh side in Europe.
Carmarthen now face a fruitless trip to Norway for the 2 August second leg.
The draw for the second round of the Cup will be made the following day.
Carmarthen Town: N Thomas, Hancock, Smothers, Palmer, Warton, K Thomas, Walters, Ramasut, Fowle, Hicks, Cotterrall.
Subs: D Thomas, Davies, Hughes, Adams, Poole.
SK Brann: Thorbjornsen, Dahl, Bjarnason, Sigurdsson, Hanstveit, Huseklepp, Andresen, Gunnar Solli, Moen, Winters, Helstad.
Subs: Opdal, Guntveit, Corrales, Jaiteh, Bjørnsson, Gashi.
Referee: Vitaliy Godulyan (Ukraine)