1 edb Jan 25, 2009 13:14
3 afwas Jan 25, 2009 17:03
6661 is a prime in the form 5(n^2 − n) + 1
6765 is a Fibonacci number (20)
7039 is a prime in the form (3n^2 + 3n + 2) / 2
7321 is a prime in the form n^2 + (n + 1)^2
8233 is a prime in the form (7n^2 − 7n + 2) / 2
(There's lost more where that came from :p)
6543, 6666 both come earlier ? ;)
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