P 1 = 1 - (785! /583! )/(786! /584! ) = 0.25699745547
The probability of drawing "1-5" is probably
p 1^5 = 0.00 1 12 109939 1988
The probability of "1-5", "2-6", "3-7" and "4-8" ... "782-786" did not happen.
( 1-p 1^5)^782 = 0.4 15949456082
The probability of five consecutive numbers is 58.4%