With some help from my manuals, a more accurate answer:
All weights in kgx1000
Aircraft: B.747-400
Engines: RR RB.211-524G
DOW: 184.0 (assuming 4 pilots and 10 cabin crew)
Load: 6.0
ZFW: 190.0
Ramp Fuel: 174.0
Ramp Wt: 364.0
Start/Taxi: 2.0
TOW: 362.0
Great Circle Distance BNE-JFK: 8,374nm
Assumed total Ground Distance: 8,500nm
In ISA and still air:
Flight Time: 17+40
Total Fuel used: 172.0
Fuel remaining
after landing: 2.0
IN OTHER WORDS; NOT VIABLE
In ISA and 25kt tailwind component:
Flight Time: 16+50
Total Fuel used: 164.5
Fuel remaining
after landing: 9.5
IN OTHER WORDS; 'NORMAL RESERVES'
A 25kt tailwind component seems reasonable but I am not familiar with the Pacific area, so you will need to check with a professional planner regarding expected ISA deviation and wind, as well as the realistic flight-planned ground distance.
You will also need the aircraft provider to confirm whether or not my DOW, crew figure and total fuel capacity assumptions are reasonable.
The last 2,000nm will be over the USA, thereby providing plenty of alternate airfields during the last 4 hours if there is a fuel shortage at the later stages of the flight.
Note that there is no allowance for 'contingency fuel'. Re-clearance procedures are assumed.
Hope this helps!