The main prize to be won on the Channel Islands Christmas Lottery now stands at £518,000 and is going up.
The money will increase as more tickets are bought, right up until the draw on 23 December.
The prize pot has grown by more than £100,000 since the start of the week.
Jon Taylor, the Senior Lottery Officer in Guernsey, said it's even more appealing for lottery players.
“This is great news for a potential winner or winners.
It’s also important to remember the CI Lottery games raise millions for local charities and worthy causes throughout the Channel Islands.”
Aside from the jackpot, six other prizes of between £50 and £50,000 will be won.
This year's draw takes place at Central Markets in Jersey.

Review into healthcare complaints in Guernsey to go ahead
Former CI Co-op boss awarded more than £3m
Guernsey Airport releases former Blue Islands aircraft
Guernsey's government sets out five ‘super priorities' over the next three years
Century old water main to replaced in Guernsey's Old Quarter
'Major housing development' near Guernsey Airport granted outline permission
Alderney enjoys a Royal Visit for the 80th Homecoming anniversary
Exhibitors finalised for first Guernsey travel show