The Number 1705: Properties and Meanings
is the smallest quasi-Carmichael number in base 4
The Year 1705 AD
In the year 1705
AD Edmond Halley predicted, using Newton's newly formulated laws of motion, that the comet seen in 1531
, and 1682
would return in 1758
(which was, alas, after his death). The comet did indeed return as predicted and was later named in his honor.