29
The highest four-digit prime number is 9,973.
The largest four-digit prime number is 9973.
3911
How about 4999
1009
It is: 1009
four The lowest 5 digits prime number is 10007
No prime number can be divided by 4 exactly.
You had me until "product." The product of 4 digits can't be prime.
There are four of each.
6859
8192 has 13 prime factors