611

This number is a composite.

The only composite number relatively prime to 1000 that remains composite when a single digit is added to the front of it, i.e., 611, 1611, 2611, 3611, 4611, 5611, 6611, 7611, 8611, and 9611 are all composite. [Ewing]

The semiprime 611 = 13 * 47. Note that moments after 6:11 p.m. EST on a 13th day of the month, there was an attempted assasination against the 47th President of the United States. [Honaker]

The Trump Organization's Boeing 611+116 is nicknamed Trump Force One. [Hubbs]