Brain Teasers
Prime Date
When was the last time all the digits in the date (dd-mm-yyyy) were a prime number? When will the next one be? Notice that it is simply digits, and not the whole number.
Ignore any leading zeroes.
Ignore any leading zeroes.
Answer
The last time all the digits in the date (dd-mm-yyyy) were a prime number was on 27-7-777 and the next one will be on 2-2-2222.Note that 1 is not a Prime number. And single digit prime numbers are 2, 3, 5 and 7.
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Comments
oh.
Good puzzle. It should say "each of the digits was a prime number.."
Eeeeeeeeeeeaaaaaaaaaassssssssssyyyyyyyy
uuuuuummm......... yea thats what i said
Again, you are truly king of the esoteric.
Nice one Mad
That was very nice! I was close to the first one. I got 22-3-777.
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