Find 2000 consecutive composite numbers.
(Of course you can't do this by trial and error alone)
For those who do not know what a composite number is, it is any integer greater than 1 that is not prime. (4, 6, 8, 9, ...)
(In reply to
answer by K Sengupta)
Of course the infinite family of sequences given by:
n!+2, n!+3, n!+4, ......, n! +2001, where n is a positive integer >=2001
is perfectly valid, with each sequence generating precisely 2000 composite numbers.