Wiki143:Reference desk/Archives/Mathematics/2007 August 19

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August 19

Null day (not)

Is there nothing notable that that could be added to make this date notable? - hydnjo talk

Today is notable. A few selected anniversaries can be found at Wikipedia:Selected anniversaries/August 18. --Iamunknown 21:37, 19 August 2007 (UTC) Thank you!

August the 18th of year 2007

Can be rewritten as 18082007

Which is a prime number. Very Very Notable. 202.168.50.40 01:04, 20 August 2007 (UTC) Thank you!

08182007 is also prime. There are 13 days DDMM for which DDMM2007 and MMDD2007 are distinct primes: 0301, 1802, 0103, 2203, 1904, 0806, 2606, 1207, 3107, 0608, 1808, 2609, 0712. PrimeHunter 01:22, 20 August 2007 (UTC) Thank you!

Not strictly mathematical but what the hey: Messier object M18 has an apparent magnitude of 8.0 (Thus 8/18, which is kind of a stretch.) WTF? - hydnjo talk

Wow - this indeed has turned out to be an interesting day, can't hardly wait for the next null day! - hydnjo talk