Draft:Bpow1997-10
Consecutive primes are often far apart. In fact, show there are arbitrarily long sequences of consecutive non-prime integers.
(Not only are consecutive primes often far apart, but it's been conjectured that they are arbitrarily far apart arbitrarily often! A solution to the following conjecture will earn you $10,000; see A Tribute to Paul Erdos, Cambridge University Press, 1990, pp. 467-477
Conjecture: For every real number C, the difference between the n'th prime and n+1'st prime exceeds the quantity infinitely often.)
Problem by Alberto L Delgado, from the now extinct Bradley Problem of the Week.