Hello, John and Doves,

 

For what it's worth II...

 

27027 = 3 X 3 X 3 X 7 X 11 X 13

 

27028 = 2 X 2 X 29 X 233 (prime)

 

Duration calculation results

From and including: Sunday, December 7, 1941
To, but not including : Monday, December 7, 2015

It is 27,028 days from the start date to the end date, but not including the end date

 

Baruch HaShem Adon Adonai Tsevaot,

Mike C.