Comment on Today’s an international prime dayComments−adorable12ySo today is an international prime day because 291113 112913 20131129 are all primesToday could also have been a "perfect prime day" if MM, DD, YY and YYYY had been prime (in addition to the above). But it's not the case...11 -> is prime29 -> is prime13 -> is prime2013 -> not prime (3 x 11 x 61)Too bad! We will have to wait another 16 years before we have a perfect prime day...−ruttiger12yya, but each of the factors of 2013 is prime, so that's gotta mean something, right?−gnur12yIsn't always possible to deconstruct the factors of a number in only primes?−s-phi-nl12yI think ruttiger may mean that 2013 is the product of three unique primes (e.g. 30=2 * 3 * 5 would be another example, but 50=5^2 * 2 is not).
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So today is an international prime day because 291113 112913 20131129 are all primes
Today could also have been a "perfect prime day" if MM, DD, YY and YYYY had been prime (in addition to the above). But it's not the case...
11 -> is prime
29 -> is prime
13 -> is prime
2013 -> not prime (3 x 11 x 61)
Too bad! We will have to wait another 16 years before we have a perfect prime day...
ya, but each of the factors of 2013 is prime, so that's gotta mean something, right?
Isn't always possible to deconstruct the factors of a number in only primes?
I think ruttiger may mean that 2013 is the product of three unique primes (e.g. 30=2 * 3 * 5 would be another example, but 50=5^2 * 2 is not).